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Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells

[Image: see text] We investigate the arrangement of donor molecules in vacuum-deposited bulk heterojunction (BHJ) 1,1-bis-(4-bis(4-methyl-phenyl)-amino-phenyl)-cyclohexane (TAPC):C(70)-based organic solar cells (OSCs). Even a low dose of donors (∼10%) forms columnar structures that provide pathways...

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Autores principales: Seo, Ji-Won, Kim, Jong Hun, Kim, Mincheol, Jin, Seon-Mi, Lee, Sang-Hoon, Cho, Changsoon, Lee, Eunji, Yoo, Seunghyup, Park, Jeong Young, Lee, Jung-Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641345/
https://www.ncbi.nlm.nih.gov/pubmed/31457939
http://dx.doi.org/10.1021/acsomega.7b01652
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author Seo, Ji-Won
Kim, Jong Hun
Kim, Mincheol
Jin, Seon-Mi
Lee, Sang-Hoon
Cho, Changsoon
Lee, Eunji
Yoo, Seunghyup
Park, Jeong Young
Lee, Jung-Yong
author_facet Seo, Ji-Won
Kim, Jong Hun
Kim, Mincheol
Jin, Seon-Mi
Lee, Sang-Hoon
Cho, Changsoon
Lee, Eunji
Yoo, Seunghyup
Park, Jeong Young
Lee, Jung-Yong
author_sort Seo, Ji-Won
collection PubMed
description [Image: see text] We investigate the arrangement of donor molecules in vacuum-deposited bulk heterojunction (BHJ) 1,1-bis-(4-bis(4-methyl-phenyl)-amino-phenyl)-cyclohexane (TAPC):C(70)-based organic solar cells (OSCs). Even a low dose of donors (∼10%) forms columnar structures that provide pathways for efficient hole transport in the BHJ layer; however, these structures disappear at donor concentrations below 10%, generating disconnected and isolated hole pathways. The formation of columnar donor structures is confirmed by the contrast of the contact potential difference, measured by Kelvin probe force microscopy, and by the trap-assisted charge injection at low donor concentrations. The mobility of electrons and holes is well balanced in OSCs owing to the preservation of the hole mobility at such low donor concentrations, consequently maximizing the internal quantum efficiency of the OSCs. A high power conversion efficiency of 6.24% was achieved in inverted TAPC:C(70) (1:9) OSCs.
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spelling pubmed-66413452019-08-27 Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells Seo, Ji-Won Kim, Jong Hun Kim, Mincheol Jin, Seon-Mi Lee, Sang-Hoon Cho, Changsoon Lee, Eunji Yoo, Seunghyup Park, Jeong Young Lee, Jung-Yong ACS Omega [Image: see text] We investigate the arrangement of donor molecules in vacuum-deposited bulk heterojunction (BHJ) 1,1-bis-(4-bis(4-methyl-phenyl)-amino-phenyl)-cyclohexane (TAPC):C(70)-based organic solar cells (OSCs). Even a low dose of donors (∼10%) forms columnar structures that provide pathways for efficient hole transport in the BHJ layer; however, these structures disappear at donor concentrations below 10%, generating disconnected and isolated hole pathways. The formation of columnar donor structures is confirmed by the contrast of the contact potential difference, measured by Kelvin probe force microscopy, and by the trap-assisted charge injection at low donor concentrations. The mobility of electrons and holes is well balanced in OSCs owing to the preservation of the hole mobility at such low donor concentrations, consequently maximizing the internal quantum efficiency of the OSCs. A high power conversion efficiency of 6.24% was achieved in inverted TAPC:C(70) (1:9) OSCs. American Chemical Society 2018-01-24 /pmc/articles/PMC6641345/ /pubmed/31457939 http://dx.doi.org/10.1021/acsomega.7b01652 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Seo, Ji-Won
Kim, Jong Hun
Kim, Mincheol
Jin, Seon-Mi
Lee, Sang-Hoon
Cho, Changsoon
Lee, Eunji
Yoo, Seunghyup
Park, Jeong Young
Lee, Jung-Yong
Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells
title Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells
title_full Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells
title_fullStr Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells
title_full_unstemmed Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells
title_short Columnar-Structured Low-Concentration Donor Molecules in Bulk Heterojunction Organic Solar Cells
title_sort columnar-structured low-concentration donor molecules in bulk heterojunction organic solar cells
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641345/
https://www.ncbi.nlm.nih.gov/pubmed/31457939
http://dx.doi.org/10.1021/acsomega.7b01652
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