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Title: Correlation between the fine structure of spin-coated PEDOT:PSS and the photovoltaic performance of organic/crystalline-silicon heterojunction solar cells

Abstract

We investigated the relationship between the fine structure of spin-coated conductive polymer poly(3,4-ethylenedioxythiphene):poly(styrene sulfonate) (PEDOT:PSS) films and the photovoltaic performance of PEDOT:PSS crystalline-Si (PEDOT:PSS/c-Si) heterojunction solar cells. Real-time spectroscopic ellipsometry revealed that there were two different time constants for the formation of the PEDOT:PSS network. Upon removal of the polar solvent, the PEDOT:PSS film became optically anisotropic, indicating a conformational change in the PEDOT and PSS chain. Polarized Fourier transform infrared attenuated total reflection absorption spectroscopy and Raman spectroscopy measurements also indicated that thermal annealing promoted an in-plane π-conjugated C{sub α} = C{sub β} configuration attributed to a thiophene ring in PEDOT and an out-of-plane configuration of -SO{sub 3} groups in the PSS chain with increasing composition ratio of oxidized (benzoid) to neutral (quinoid) PEDOT, I{sub qui}/I{sub ben}. The highest power conversion efficiency for the spin-coated PEDOT:PSS/c-Si heterojunction solar cells was 13.3% for I{sub qui}/I{sub ben} = 9–10 without employing any light harvesting methods.

Authors:
; ; ; ; ; ;  [1]
  1. Graduate School of Science and Engineering, Saitama University, Saitama 338-8570 (Japan)
Publication Date:
OSTI Identifier:
22597815
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 3; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTROSCOPY; CONFORMATIONAL CHANGES; ELLIPSOMETRY; FINE STRUCTURE; FOURIER TRANSFORM SPECTROMETERS; HETEROJUNCTIONS; PERFORMANCE; PHOTOVOLTAIC EFFECT; POLYCYCLIC SULFUR HETEROCYCLES; RAMAN SPECTROSCOPY; REAL TIME SYSTEMS; SILICON SOLAR CELLS; SPIN; STYRENE; SULFONATES; THIOPHENE

Citation Formats

Funda, Shuji, Ohki, Tatsuya, Liu, Qiming, Hossain, Jaker, Ishimaru, Yoshihiro, Ueno, Keiji, and Shirai, Hajime. Correlation between the fine structure of spin-coated PEDOT:PSS and the photovoltaic performance of organic/crystalline-silicon heterojunction solar cells. United States: N. p., 2016. Web. doi:10.1063/1.4958845.
Funda, Shuji, Ohki, Tatsuya, Liu, Qiming, Hossain, Jaker, Ishimaru, Yoshihiro, Ueno, Keiji, & Shirai, Hajime. Correlation between the fine structure of spin-coated PEDOT:PSS and the photovoltaic performance of organic/crystalline-silicon heterojunction solar cells. United States. https://doi.org/10.1063/1.4958845
Funda, Shuji, Ohki, Tatsuya, Liu, Qiming, Hossain, Jaker, Ishimaru, Yoshihiro, Ueno, Keiji, and Shirai, Hajime. Thu . "Correlation between the fine structure of spin-coated PEDOT:PSS and the photovoltaic performance of organic/crystalline-silicon heterojunction solar cells". United States. https://doi.org/10.1063/1.4958845.
@article{osti_22597815,
title = {Correlation between the fine structure of spin-coated PEDOT:PSS and the photovoltaic performance of organic/crystalline-silicon heterojunction solar cells},
author = {Funda, Shuji and Ohki, Tatsuya and Liu, Qiming and Hossain, Jaker and Ishimaru, Yoshihiro and Ueno, Keiji and Shirai, Hajime},
abstractNote = {We investigated the relationship between the fine structure of spin-coated conductive polymer poly(3,4-ethylenedioxythiphene):poly(styrene sulfonate) (PEDOT:PSS) films and the photovoltaic performance of PEDOT:PSS crystalline-Si (PEDOT:PSS/c-Si) heterojunction solar cells. Real-time spectroscopic ellipsometry revealed that there were two different time constants for the formation of the PEDOT:PSS network. Upon removal of the polar solvent, the PEDOT:PSS film became optically anisotropic, indicating a conformational change in the PEDOT and PSS chain. Polarized Fourier transform infrared attenuated total reflection absorption spectroscopy and Raman spectroscopy measurements also indicated that thermal annealing promoted an in-plane π-conjugated C{sub α} = C{sub β} configuration attributed to a thiophene ring in PEDOT and an out-of-plane configuration of -SO{sub 3} groups in the PSS chain with increasing composition ratio of oxidized (benzoid) to neutral (quinoid) PEDOT, I{sub qui}/I{sub ben}. The highest power conversion efficiency for the spin-coated PEDOT:PSS/c-Si heterojunction solar cells was 13.3% for I{sub qui}/I{sub ben} = 9–10 without employing any light harvesting methods.},
doi = {10.1063/1.4958845},
url = {https://www.osti.gov/biblio/22597815}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 3,
volume = 120,
place = {United States},
year = {2016},
month = {7}
}