Cargando…

Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis

Electronic transport measurement using modulated photocurrent (MPC) spectroscopy is demonstrated herein in working organic photovoltaics (OPVs) before and after AM1.5G irradiation. OPVs with bulk heterojunction (BHJ) using prototypical donor and acceptor materials, poly[[4,8-bis[(2-ethylhexyl)oxy]be...

Descripción completa

Detalles Bibliográficos
Autores principales: Nakatsuka, Emi, Kumoda, Yo, Mori, Kiyohito, Kobayashi, Takashi, Nagase, Takashi, Naito, Hiroyoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321640/
https://www.ncbi.nlm.nih.gov/pubmed/32545220
http://dx.doi.org/10.3390/ma13112660
_version_ 1783551514849050624
author Nakatsuka, Emi
Kumoda, Yo
Mori, Kiyohito
Kobayashi, Takashi
Nagase, Takashi
Naito, Hiroyoshi
author_facet Nakatsuka, Emi
Kumoda, Yo
Mori, Kiyohito
Kobayashi, Takashi
Nagase, Takashi
Naito, Hiroyoshi
author_sort Nakatsuka, Emi
collection PubMed
description Electronic transport measurement using modulated photocurrent (MPC) spectroscopy is demonstrated herein in working organic photovoltaics (OPVs) before and after AM1.5G irradiation. OPVs with bulk heterojunction (BHJ) using prototypical donor and acceptor materials, poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1–2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl] = hieno [3–4-b]thiophenediyl]] (PTB7) and [6,6]-phenyl-C71-butyric acid methyl ester (PC(71)BM), were fabricated. The OPVs had inverted structures (BHJs are formed on transparent conductive oxide substrates). The photovoltaic performance of PTB7:PC(71)BM OPVs was characterized and the best power conversion efficiency was obtained at PTB7 content of 40 wt%. Electron and hole mobility were determined with MPC spectroscopy in PTB7:PC(71)BM OPVs and were well balanced at PTB7 content of 40 wt%. Degradation of the photovoltaic performance of PTB7:PC(71)BM OPVs with PTB7 content of 40 wt% caused by AM1.5G irradiation was studied. MPC spectroscopy showed that the well-balanced mobility was not affected by AM1.5G irradiation. The degradation of OPVs was not due to changes in the electronic transport properties, but mainly to the reduced short circuit current (J(sc)) and fill factor (FF). The origin of this reduction is discussed.
format Online
Article
Text
id pubmed-7321640
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-73216402020-07-20 Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis Nakatsuka, Emi Kumoda, Yo Mori, Kiyohito Kobayashi, Takashi Nagase, Takashi Naito, Hiroyoshi Materials (Basel) Article Electronic transport measurement using modulated photocurrent (MPC) spectroscopy is demonstrated herein in working organic photovoltaics (OPVs) before and after AM1.5G irradiation. OPVs with bulk heterojunction (BHJ) using prototypical donor and acceptor materials, poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1–2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl] = hieno [3–4-b]thiophenediyl]] (PTB7) and [6,6]-phenyl-C71-butyric acid methyl ester (PC(71)BM), were fabricated. The OPVs had inverted structures (BHJs are formed on transparent conductive oxide substrates). The photovoltaic performance of PTB7:PC(71)BM OPVs was characterized and the best power conversion efficiency was obtained at PTB7 content of 40 wt%. Electron and hole mobility were determined with MPC spectroscopy in PTB7:PC(71)BM OPVs and were well balanced at PTB7 content of 40 wt%. Degradation of the photovoltaic performance of PTB7:PC(71)BM OPVs with PTB7 content of 40 wt% caused by AM1.5G irradiation was studied. MPC spectroscopy showed that the well-balanced mobility was not affected by AM1.5G irradiation. The degradation of OPVs was not due to changes in the electronic transport properties, but mainly to the reduced short circuit current (J(sc)) and fill factor (FF). The origin of this reduction is discussed. MDPI 2020-06-11 /pmc/articles/PMC7321640/ /pubmed/32545220 http://dx.doi.org/10.3390/ma13112660 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Nakatsuka, Emi
Kumoda, Yo
Mori, Kiyohito
Kobayashi, Takashi
Nagase, Takashi
Naito, Hiroyoshi
Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis
title Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis
title_full Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis
title_fullStr Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis
title_full_unstemmed Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis
title_short Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis
title_sort modulated photocurrent spectroscopy study of the electronic transport properties of working organic photovoltaics: degradation analysis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321640/
https://www.ncbi.nlm.nih.gov/pubmed/32545220
http://dx.doi.org/10.3390/ma13112660
work_keys_str_mv AT nakatsukaemi modulatedphotocurrentspectroscopystudyoftheelectronictransportpropertiesofworkingorganicphotovoltaicsdegradationanalysis
AT kumodayo modulatedphotocurrentspectroscopystudyoftheelectronictransportpropertiesofworkingorganicphotovoltaicsdegradationanalysis
AT morikiyohito modulatedphotocurrentspectroscopystudyoftheelectronictransportpropertiesofworkingorganicphotovoltaicsdegradationanalysis
AT kobayashitakashi modulatedphotocurrentspectroscopystudyoftheelectronictransportpropertiesofworkingorganicphotovoltaicsdegradationanalysis
AT nagasetakashi modulatedphotocurrentspectroscopystudyoftheelectronictransportpropertiesofworkingorganicphotovoltaicsdegradationanalysis
AT naitohiroyoshi modulatedphotocurrentspectroscopystudyoftheelectronictransportpropertiesofworkingorganicphotovoltaicsdegradationanalysis