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Title: Two-dimensional polythiophene homopolymer as promising hole transport material for high-performance perovskite solar cells

Abstract

A polythiophene homopolymer with conjugated side chains (2D-PT) was applied as a hole transport material (HTM) of perovskite solar cells (PSCs). The all-conjugated two-dimensional structure effectively increases the ionization potential, realizing a high open-circuit voltage near 1 V for the 2D-PT-based PSC. Very interestingly, the two-dimensional wide-angle X-ray scattering measurements show that the 2D-PT molecules are self-assembled into ordered structure with a face-on dominant orientation and exhibit a hole mobility, which is ~1.6 times faster than that of poly(3-hexylthiophene) (P3HT). Consequently, the power conversion efficiency of PSC is noticeably increased by ~30% as 2D-PT replaces P3HT as HTM. Moreover, the densely packed 2D-PT slows down the moisture induced degradation of perovskite crystals, leading to a better environmental stability. As a result, this work demonstrates that two-dimensional non-donor-acceptor structural conjugated polymers can be utilized as promising HTM of PSCs.

Authors:
 [1];  [1];  [2];  [3];  [2];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. National Taiwan Univ., Taipei (Taiwan)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. National Taiwan Univ. of Science and Technology, Taipei (Taiwan)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Taiwan University
OSTI Identifier:
1508128
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 426; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Perovskite solar cells; Conjugated polymers; Hole transport materials

Citation Formats

Hsieh, Hsiao -Chi, Hsiow, Chuen -Yo, Su, Yu -An, Liu, Yu -Cheng, Chen, Wei, Chiu, Wen -Yen, Shih, Yen -Chen, Lin, King -Fu, and Wang, Leeyih. Two-dimensional polythiophene homopolymer as promising hole transport material for high-performance perovskite solar cells. United States: N. p., 2019. Web. doi:10.1016/j.jpowsour.2019.04.008.
Hsieh, Hsiao -Chi, Hsiow, Chuen -Yo, Su, Yu -An, Liu, Yu -Cheng, Chen, Wei, Chiu, Wen -Yen, Shih, Yen -Chen, Lin, King -Fu, & Wang, Leeyih. Two-dimensional polythiophene homopolymer as promising hole transport material for high-performance perovskite solar cells. United States. doi:10.1016/j.jpowsour.2019.04.008.
Hsieh, Hsiao -Chi, Hsiow, Chuen -Yo, Su, Yu -An, Liu, Yu -Cheng, Chen, Wei, Chiu, Wen -Yen, Shih, Yen -Chen, Lin, King -Fu, and Wang, Leeyih. Fri . "Two-dimensional polythiophene homopolymer as promising hole transport material for high-performance perovskite solar cells". United States. doi:10.1016/j.jpowsour.2019.04.008.
@article{osti_1508128,
title = {Two-dimensional polythiophene homopolymer as promising hole transport material for high-performance perovskite solar cells},
author = {Hsieh, Hsiao -Chi and Hsiow, Chuen -Yo and Su, Yu -An and Liu, Yu -Cheng and Chen, Wei and Chiu, Wen -Yen and Shih, Yen -Chen and Lin, King -Fu and Wang, Leeyih},
abstractNote = {A polythiophene homopolymer with conjugated side chains (2D-PT) was applied as a hole transport material (HTM) of perovskite solar cells (PSCs). The all-conjugated two-dimensional structure effectively increases the ionization potential, realizing a high open-circuit voltage near 1 V for the 2D-PT-based PSC. Very interestingly, the two-dimensional wide-angle X-ray scattering measurements show that the 2D-PT molecules are self-assembled into ordered structure with a face-on dominant orientation and exhibit a hole mobility, which is ~1.6 times faster than that of poly(3-hexylthiophene) (P3HT). Consequently, the power conversion efficiency of PSC is noticeably increased by ~30% as 2D-PT replaces P3HT as HTM. Moreover, the densely packed 2D-PT slows down the moisture induced degradation of perovskite crystals, leading to a better environmental stability. As a result, this work demonstrates that two-dimensional non-donor-acceptor structural conjugated polymers can be utilized as promising HTM of PSCs.},
doi = {10.1016/j.jpowsour.2019.04.008},
journal = {Journal of Power Sources},
number = C,
volume = 426,
place = {United States},
year = {2019},
month = {4}
}

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This content will become publicly available on April 12, 2020
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