Faculty Profiles - PANDEY Shyam sudhir

Lectures -

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Amicable Approaches for Immense Solar Energy Harvesting by Dye-Sensitized Solar Cells

International Conference on Advances in Science and Technology for Sustainable Development Goals (IC-ASTSDGs-2024), AKS University, Satna, MP, India from March 11-12, 2024 2024.03

Tailoring the Functional Materials and & Device Architecture for Low-Cost and Immense Solar Energy Harvesting

International Conference on New Materials for Industry and Medicine (NMIM-24), India from 2024.01

Floating Film Transfer: A Facile and Cost-Effective Approach Towards Uniform Large Area Oriented Thin Films for Organic Electronic Devices

The 30th International Display Workshop (IDW-2023), Toki Messe Convention Center, Niigata, Japan from December 6-8, 2023 2023.12

ENHANCING THE POTENTIALITY OF DSSCs UTILIZING NIR DYES: TRANSPARENT AND BIFACIAL DSSCs;

The 22nd International Discussion & Conference on Nano Interface Controlled Electronic Devices (IDC-NICE 2023) Oct. 11~13, 2023 I-site Namba, Osaka Metropolitan Univ., Osaka, Japan 2023.10

Facile, Cost-Effective and Environment-Friendly Approaches Towards Oriented Thin Film Fabrication for Flexible Organic Electronic Devices

THE 7th INTERNATIONAL SYMPOSIUM ON ADVANCED MATERIALS AND NANOTECHNOLOGY 2023 (iSAMN 2023), UPM, Malaysia, Sept. 12-13, 2023 2023.09 UPM Malaysia

Facile Fabrication of Large Area Oriented Thin Films of Conjugated Polymers for Organic Electronic Devices

Research discussion on organic electronic devices and materials, Tokyo Institute of Technology Ookayama, Tokyo May 26-27, 2023 2023.05

Prospects & Challenges with Molecular Orientation Control of Organic Semiconductors towards Low-Cost Organic Electronic Devices

2nd International Conference on Emerging Electronics and Automation (E2A-2022), Hybrid Mode, NIT Silchar, Assam, India, December 16-18, 2022 2022.12 NIT Silchar, Assam, India

Event date： 2022.12.16 - 2022.12.18 Language：English Presentation type：Keynote lecture Venue：NIT Silchar, Assam, India Country：India

Recent past has witnessed very fast development of solution processable organic semiconductors and their utilization as active components of organic electronic devices aiming towards the practical realization of low-cost flexible and printable electronics. Organic electronic devices need multilayer fabrication of devise components, where control of their morphology along with the various interfaces critically controls the overall performance of the devices. Therefore, there is an urge for the facile fabrication of large area uniform films with controllable film morphology and minimal interference to underlying layers. We have developed a novel method of thin film fabrication known as floating film transfer method (FTM), which provides large area uniform films and oriented thin films of organic semiconductors. This technique has been successfully employed to a number of conjugated polymers (CPs) to fabricated their large area and oriented thin films followed by the investigation of their anisotropic charge carrier transport. We have demonstarted that by controlling the parameters for thin film fabrication using NR-P3HT under FTM led to not only macroscopically oriented films but also there was a remarkable enhancement in the field effect mobility (>100 times) as compared to their spin-coated film counterparts. Utilizing highly edge-on oriented thin film thin films of PBTTT-C14 processed by FTM, we have not only demonstarted a very high optical dichroism of >10 but also an OFET mobility of 1.24 cm2/Vs, which is one of the highest reported mobility values for this class of CPs. At the same time, we have also newly developed 2D positional mapping system capable of swift measurement of thickness and orientation distribution in the large area thin film. Reliability of this mapping systems has been validated utilizing a number of thin films of different type of CPs fabricated by different techniques such as spin-coating, friction transfer and FTM. Results pertaining to the oriented film fabrication, orientation mechanism, film uniformity and anisotropy along with the application of utilizing oriented thin films in the organic electronic devices will be highlighted & discussed in detail.

Other Link： http://e2a2022.nits.ac.in/

DEVELOPMENT OF NIR-SENSITIVE DYES FOR DYE-SENSITIZED SOLAR CELLS BASED ON COMBINED THEORETICAL &EXPERIMENTAL APPROACHES

The 21st International Discussion & Conference on Nano Interface Controlled Electronic Devices (IDC-NICE 2022), October 13-14, 2022 2022.10 Inje University, Pusan, South Korea

Event date： 2022.10.13 Language：English Presentation type：Invited lecture Venue：Inje University, Pusan, South Korea Country：Korea, Democratic People's Republic of

Dye-sensitized solar cells (DSSCs) have attracted huge attention not only due to environment-friendly and cost-effective solar energy harvesting but also their aesthetic vibrant colour tunability and tremendous potential for building integrated photovoltaics due to controllable transparency [1,2]. Bi-facial solar cells are another area, where DSSCs find tremendous potential also due to the possibility of utilizing transparent counter electrodes. State-of-art DSSCs have reached photoconversion efficiencies (PCE) beyond 13% despite photon harvesting window mainly in the visible wavelength region covering only 45 % photon flux of the solar spectrum. Therefore, the design and development of near-infrared (NIR) dyes are inevitable for further improvement in the PCE by panchromatic photon harvesting. Our group is involved in the development of NIR dyes for >10 years aiming toward the enhancement of the PCE of DSSCs. A series of NIR dyes from the Squaraine (SQ) family has been designed considering aspects like energetic control, wavelength tunability and implication of nature of anchoring group on the photovoltaic performance of DSSCs based on combined theoretical using Quantum Chemical (QC) and experimental approaches [3]. We have demonstrated reliable prediction of the energetics and spectral behaviour of NIR dyes utilizing Gaussian for QC calculations with an excellent match between the theoretically calculated and experimentally observed results [4,5]. In my talk, emphasis will be given to the design and development of novel NIR dyes aiming towards not only enhancing the efficiency and stability of DSSCs but also their suitability in colourful transparent as well as bifacial solar cells.

Nano-Interface Control @t Molecule & Materials for Enhancing the Performance of Cost-Effective Dye-Sensitized Solar Cells

Molecules to material for sustainable development M2M-2022, DDU Gorakhpur University, March 25-26, 2022, Online 2022.03 DDU Gorakhpur University, UP India

Facile and Cost-Effective Solar Energy Harvesting by the Next Generation Dye-Sensitized Solar Cells

International Seminar On Advance Research in Molecular & Material Science - 2022 (ARM2S - 2022) March 01 – 02, 2022 Sikkim Manipal Institute of Technology, India, 2022.03 SMIT, India

Design and Development of NIR Dyes for Immense Solar Energy Harvesting based on Combined Theoretical and Experimental Approaches

Special Lecture Series for Graduate Students 2022.01 Nara Advanced Institute of Science and Technology, Nara Japan

Design and Development of NIR Dyes for Immense Solar Energy Harvesting based on Combined Theoretical and Experimental Approache

7th International Conference on Nanomaterials and Nanotechnology (ICANN2021), Indian Institute of Technology, Guwahati, Assam India, December 14-17, 2021, 2021.12 IIT Guwahai Assam, India

Facile Approaches for Molecular Orientation towards Control of Device Performance in Organic Electronic Devices

India-Japan Workshop on Biomolecular Electronics and Organic Nanotechnology for Environment Preservation (IJWBME 2020) Venture Hall, Venture Business Laboratory, Nagoya University, Nagoya, Japan, and online (Zoom), 2021.12

Sensing and Actuation: Moving from Soft & Wet in Liquid to Soft, Flexible & Dry in Solid-State

Active Materials and Soft Mechatronics 2021 (AMSM2021), Toyohashi University, Japan, November 10-12, 2021, Online Conference 2021.11

CONTROL OF MOLECULAR ORIENTATIONS BY ENVIRONMENTALLY BENIGN TECHNIQUES AND THEIR VISUALIZATION FOR ORGANIC ELECTRONIC DEVICES

20th International Discussion and Conference on Nanointerface Controlled Electronic Devices (IDC-NICE 2021), South Korea, Online Meeting, 2021.10

Fabrication of Large Area Oriented Thin Films by Floating Film Transfer and their 2D Profiling for Organic Electronic Devices

11th International Conference on Flexible and Printed Electronics (ICFPE-2021), Online Meeting, 2021.09

Immense Solar Energy Harvesting by Photosynthetic Mimic of Dye-Sensitized Solar Cells: A Plenty of Rooms for Chemists

International E-Conference on Recent Advances in Chemical Sciences (E-ICRACS-21), Department of Chemistry, LNMU Darbhanga, India, July 28, 2021 2021.07 Department of Chemistry, LNMU Darbhanga, India

Photovoltaic Devices & Systems: Challenges & Scope

QIP sponsored Short Term Course on Photovoltaic Devices & Systems: Challenges & Scope, July 8-13, 2021, IIT-Indore, India 2021.03 Department of Electrical Engineering, IIT Indore, India

Learning from Nature & Shaking Hands with Engineering towards the solution of Intriguing Futuristic Energy Problems

International Webinar on Recent Contributions of Chemical Sciences to Modern Society (RCCSMS-2021) Mar 1-2, 2021, AKS University, Satna, MP, India 2021.03 AKS University, Satna, MP, India

Playing with Molecular Orientation in Conducting Polymers and their 2D-Positional Mapping for High Performance Organic Electronic Devices

International Conference on Futuristic Materials (ICFM-20), December 18-20, 2021, Department of Physics, DDU Gorakhpur University, UP India 2020.12 Department of Physics, DDU Gorakhpur University, UP India

Presentation type：Special lecture Venue：Online; Department of Physics, DDU Gorakhpur University, UP India

Conducting polymers (CPs) have demonstrated their lead role as active organic semiconductors towards the practical realization of the next generation flexible and wearable electronics. High performance organic electronic devices utilizing organic semiconductors have been although demonstrated utilizing thermal evaporation techniques but such a thin film processing is not suitable large area implementation. Due to one-dimensional nature of conjugated polymers (CPs), they are susceptible to molecular self-aggregation, therefore, their film morphology and molecular orientation plays a dominant role in deciding the final device performance. Although spin-coating is one of most widely used technique, but huge material wastage and challenges for multi-layer coating are intriguing issues. To circumvent these issues, our group developed and improvised a facile and highly cost-effective technique named as floating film transfer method (FTM) to fabricate large area oriented thin films of CPs. Using NR P3HT as organic semiconductor, we have demonstrated that FTM processed thin films exhibited a remarkable enhancement (>102 times) in the FET mobility. Utilizing a liquid crystalline CP, PBTTT-C14, we have demonstrated the FET mobility of 1.24 cm2/Vs, which is one of the highest values reported for this class of material.
Apart from facile large area thin film fabrication, probing the film homogeneity in terms of thickness and extent of orientations especially in the large area of the films is inevitable. To provide an amicable solution for this issue, we have newly developed 2-dimensional positional mapping system for a facile and swift profiling of thickness as well as the molecular orientation. At the same time, validity of newly designed 2D positional mapping system was also proved using a number of CPs fabricated by different thin film fabrication methods.

Immense Solar Energy Harvesting by Dye-Sensitized Solar Cells: A Plenty of Rooms for Chemists

International Webinar on Current Trends and Future Prospective of Chemistry in Pandemic Era, DDU Gorakhpur University, UP India, September 28-29, 2020 2020.09 DDU Gorakhpur University, UP India

Orientation of Semiconducting Polymers via Swift Printing and Drawing Techniques for High Performance Organic Electronic Devices

THE TWENTY-SEVENTH INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES -TFT TECHNOLOGIES AND FPD MATERIALS [AM-FPD20] 2020.09 Japan Applied Physics Society

Emerging Role of Chemists for Solar Energy Harvesting Via Next Generation Dye-Sensitized Solar Cells

International Webinar on Recent Innovation in Chemical Sciences (RICS-2020), AKS University, Satna, MP India, 2020.07 AKS University, Satna, MP India

Design and Development of NIR Dyes by Altering the Anchoring Groups aiming towards High Stability and Efficiency

6th International Conference on Advanced Nanomaterials and Nanotechnology (ICANN2019) 2019.12

Design and Development of NIR Dyes by Altering the Anchoring Groups aiming towards High Stability and Efficiency Ajendra Kumar Vats, Shuzi Hayase, Syam S. Pandey

6th International Conference on Advanced Nanomaterials and Nanotechnology (ICANN2019 2019.12 Indian Institute of Technology, Guwahati

Nanomolecular Self-Assembly Control of Organic Semiconductors & Their Visualization by 2D Positional Mapping

International Conference on Precision, Meso, Micro & Nano Engineering [COPEN-11] 2019.12

Nanomolecular Self-Assembly Control of Organic Semiconductors & Their Visualization by 2D Positional Mapping Shyam S. Pandey

International Conference on Precision, Meso, Micro & Nano Engineering [COPEN-11] 2019.12 Indian Institute of Technology, Indore

Molecular Orientation and Device Performance in Organic Electronic Devices: Control & Visualization

7th International Symposium on Applied Engineering and Sciences (SAES2019) 2019.11

Molecular Orientation and Device Performance in Organic Electronic Devices: Control & Visualization Shyam S. Pandey, Nikita Kumari, Shubham Sharma, Shuichi Nagamatsu, Shuzi Hayase

7th International Symposium on Applied Engineering and Sciences (SAES2019) 2019.11 Universiti Putra Malaysia

Dye-Sensitized Solar Cells in the Realm of Future Energy Challenges: Materials Design & Device Engineering

The 8th Joint Conference on Renewable Energy and Nanotechnology (JCREN-2019) 2019.11

Dye-Sensitized Solar Cells in the Realm of Future Energy Challenges: Materials Design & Device Engineering Shyam S. Pandey

The 8th Joint Conference on Renewable Energy and Nanotechnology (JCREN-2019), 2019.11

Molecular Orientation and Its 2D Profiling for Organic Electronic Devices

19th International Discussion and Conference on Nano Interface Controlled Electronic Devices (IDC-NICE 2019) 2019.10 Japan Society of Applied Physics

Molecular Orientation and Its 2D Profiling for Organic Electronic Devices Nikita Kumari, Shubham Sharma, Shuichi Nagamatsu, Shyam S. Pandey

19th International Discussion and Conference on Nano Interface Controlled Electronic Devices (IDC-NICE 2019) 2019.10 Japan Applied Physics Society

Large Area Molecular Orientation of Conjugated Polymers and its Visualization by 2D Positional Mapping for Organic Electronics [INVITED TALK] Shyam S. PANDEY, Manish PANDEY, Nikita KUMARI, Atul SM TRIPATHI, Shuichi NAGAMATSU, Shuzi HAYASE

10th International Conference on Materials for Advanced Technologies (ICMAT-2019) 2019.06 MRS-Singapore

Orientating Thin Films of Conjugated Polymers by FTM and Its Visualization by 2D Positional Mapping for Organic Electronics Shyam S. Pandey, Manish Pandey, Nikita Kumari, Atul SM Tripathi, Shuichi Nagamatsu, Shuzi Hayase

India-Japan Workshop on Biomolecular Electronics and Organic Nanotechnology for Environment Preservation (IJWBME-2018) 2018.12 JSPS Japan and DST India

Orientating Thin Films of Conjugated Polymers by FTM and Its Visualization by 2D Positional Mapping for Organic Electronics

India-Japan Workshop on Biomolecular Electronics and Organic Nanotechnology for Environment Preservation (IJWBME-2018), 2018.12 DST(India)-JSPS(Japan)

Fusion of Chemistry and Electricity: Role of Dye-sensitized Solar Cells towards Amicable Solution for Future Energy Challenges

International Conference on Emerging Trends in Chemical Sciences (ICETCS) 2018.02

Prospects and Challenges with the Development of Near Infrared Dyes for Dye-Sensitized Solar Cells

5th International Conference on Advanced Nanomaterials and Nanotechnology (ICANN-2017) 2017.12

Prospects and Challenges with the Development of Near Infrared Dyes for Dye-Sensitized Solar Cells

5th International Conference on Advanced Nanomaterials and Nanotechnology (ICANN-2017), IIT-Guwahati, Assam, India, December 18-21, 2017 2017.12

Energy Barrier Mapping Towards the Development of NIR Dyes for Dye-Sensitized Solar Cell

UPM-Kyutech Joint Seminar on Solar Technology 2017.03

Mapping of Minimum Energy Barrier for Electron Injection and Dye Regeneration Utilizing Model Squaraine Dyes

4th International Symposium on Applied Engineering and Sciences (SAES 2016) 2016.12

Mapping of Minimum Energy Barrier for Electron Injection and Dye Regeneration Utilizing Model Squaraine Dyes

4th International Symposium on Applied Engineering and Sciences (SAES 2016) 2016.12 Kyushu Institute of Technology

Computational Molecular Design of Novel Dyes with Sensitivity in Far-red to Near Infra-red Wavelength Region for Dye-Sensitized Solar Cells

International Conference on Communications and Computing Systems (ICCC-2016), 2016.09

Computational Molecular Design of Novel Dyes with Sensitivity in Far-red to Near Infra-red Wavelength Region for Dye-Sensitized Solar Cells

International Conference on Communications and Computing Systems (ICCCS-2016) 2016.09

Next Generation Solar Cells in the Realm of Future Energy Challenges: From Materials Design to Device Architecture

International Conference on Electrical and Electronic Technology (ICEETech-2016), 2016.08

Next Generation Solar Cells in the Realm of Future Energy Challenges: From Materials Design to Device Architecture

International Conference on Electrical and Electronic Technology (ICEETech-2016) 2016.08 University Putra Malaysia, Malaysia

Prospects and Challenges with NIR Dyes for Next Generation Dye-Sensitized Solar Cells

NTU-Kyutech Seminar 2016.03

Challenges with near infra-red dye design and its prospects for enhancing the efficiency of dye-sensitized solar cells

Invited Lecture Series, IIT-BHU, India 2015.02 IIT-BHU, Varanasi, India

Design and Development of NIR Dyes for Next Generation Solar Cells

Joint Research Meeting between IIT-Indore and KIT 2014.03 Indian Institute of Technology, Indore, MP, India

Design and Development of NIR Dyes for Next Generation Solar Cells

IIT-KIT Joint Research Meet-2014 2014.03 Indian Institute of Technology, BHU, Varanasi, India

Development of NIR Dyes & Control of Dye Adsorption Behavior in Dye-Sensitized Solar Cells

The 4th PHOENICS International Symposium 2014.02

Design and Development of NIR Dyes along with Interface Control in Dye-Sensitized Solar Cells

Discussion Forum for the Society of Nanometric Interfacial Controlled Electronic Devices 2014.02

Design of Squaraine based NIR Dyes for Dye-Sensitized Solar Cells

FIRST International Open Symposium for Scientist "Organic Photovoltaics Tap Our Future" 2014.02

Designing NIR dyes for dye-sesnitized solar cells in the light of theoretical and photophysical investigations

India-Japan Workshop on Biomolecular Electronics & Organic Nanotechnology for Environment Preservation (IJWBME 2013) 2013.12

Nanostructured Poly(3-hexylthiophene) Thin Films by Adhering Deposition in Suspensions

India-Japan Workshop on Biomolecular Electronics and Organic Nanotechnology for Environmental Preservation (IJWBME-2013) 2013.12

Transparent Conductive Oxide-Less Dye-Sensitized Solar Cells

2nd International Conference on Photocatalysis and Solar Energy Conversion (PASEC-2) 2013.07

Prospects of Dye-Sensitized Solar Cells towards the solution of future energy needs

Invited Lecture Series Oranized by Indian Institute of Technology, Patna, INDIA 2013.02 Indian Institute of Technology, Patna, Bihar, India

Fusion of Chemistry & Electricity for Solar Energy Harvesting

Special COE Lecture Organized by Department of Chemistry 2013.02

Potentiality and Prospects of Dye Sesnitized Solar Cells

Lecture Organized under India-Japan joint bilalteral project 2013.02 Indian Institute of Technology, BHU, India

Design & Development of Squaraine Sensitizers for the Efficient Dye-Sensitized Solar Cells

Special Invited Lecture Series by Japanese Scientists 2012.11 Department of Biotechnology, DTU, Delhi, India

PHOTOVOLTAIC PERFORMANCES OF SNO2 BASED BOTTOM ELECTRODE FOR TANDEM DYE-SENSITIZED SOLAR CELLS

21st International Photovoltaic and Engineering Conference [PVSEC-21] 2011.11

Toward high efficiency and low cost dye-sensitized solar cells [

The 6th Acenian Conference on Dye-sensitized and Organic Solar Cells (DSC-OPV6) 2011.10

Tandem and Hybrid Dye-Sensitized Solar Cells

Japan-Korea Joint Workshop on Development of Novel and Intelligent Nanomaterials 2011.10

Transparent Conductive Oxide-less Dye-sensitized Solar Cells Consisting of Flexible Nanoporous Titania Sheet-Flexible Cylinder, Fiber and Hybrid Dye sensitized Solar Cells

First Bilateral Spanish-Japanese Symposium on Nanotechnology and Nano Materials on Environmental Challange (SJNANO-2011), Toledo, Spain 2011.09

Photophysical Behavior of A Red Absorbing Squaraine Sensitizer in Solution, Solid State and with TiO2 Nanoparticle Thin Films

First Bilateral Spanish-Japanese Symposium on Nanotechnology and Nano Materials on Environmental Challange (SJNANO-2011), Toledo, Spain 2011.09

TCO-less Dye sensitized solar cells

Electrochemical Society Japan, Autumn Meeting, Niigata Convention Center, Niigata, Japan 2011.09

Femtosecond dynamics of squaraine molecules with potential application as sensitizers in DSSCs

III JIF-Meeting on Photochemistry (GRUFO-2011), University of Granada, Spain 2011.09

Interfacing Chemistry and Electricity for Next Generation Solar Cells

(未入力) 2010.11 Kitakyushu College of Technology

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Lectures -