Carbazole-Based Hole Transport Polymer for Methylammonium-Free Tin–Lead Perovskite Solar Cells with Enhanced Efficiency and Stability

Wang, Jiantao; Yu, Zhenhua; Astridge, Daniel D.; Ni, Zhenyi; Zhao, Liang; Chen, Bo; Wang, Mengru; Zhou, Ying; Yang, Guang; Dai, Xuezeng; Sellinger, Alan; Huang, Jinsong

doi:10.1021/acsenergylett.2c01578

Carbazole-Based Hole Transport Polymer for Methylammonium-Free Tin–Lead Perovskite Solar Cells with Enhanced Efficiency and Stability

Journal Article · Mon Sep 12 00:00:00 EDT 2022 · ACS Energy Letters

DOI:https://doi.org/10.1021/acsenergylett.2c01578· OSTI ID:1891007

^[1]; Yu, Zhenhua ^[2]; ^[3]; ^[2]; Zhao, Liang ^[2]; Chen, Bo ^[2]; ^[2]; Zhou, Ying ^[2]; Yang, Guang ^[2]; ^[2]; ^[4]; ^[2]

Univ. of North Carolina, Chapel Hill, NC (United States); UNC
Univ. of North Carolina, Chapel Hill, NC (United States)
Colorado School of Mines, Golden, CO (United States)
Colorado School of Mines, Golden, CO (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)

As the most commonly used hole transport material (HTM) in tin–lead (Sn–Pb) perovskite solar cells (PSCs), poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS) limits the power conversion efficiency (PCE) and stability of the PSCs due to its acidic characteristics. Herein, an easily synthesized polymer HTM poly[(phenyl)imino[9-(2-ethylhexyl)carbazole]-2,7-diyl] (CzAn) with a shallow highest occupied molecular orbital (HOMO) level of –4.95 eV is used in a p-i-n structure, methylammonium-free, Sn–Pb PSC to replace PEDOT:PSS. Upon optimization using doping and surface engineering, high quality Sn–Pb PSCs could be successfully fabricated, boosting the PCE to 22.6% (stabilized PCE of 21.3%) compared with 21.2% for PEDOT:PSS. Here, the perovskite films prepared on the modified CzAn HTM possess improved crystallinity, reduced trap-state density, and larger carrier mobility resulting in PSCs with greatly improved stability.

View Accepted Manuscript (DOE)

Research Organization:: Colorado School of Mines, Golden, CO (United States); Univ. of North Carolina, Chapel Hill, NC (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: EE0008749; EE0008978

OSTI ID:: 1891007

Alternate ID(s):: OSTI ID: 1894665
OSTI ID: 1896715
OSTI ID: 1898023

Journal Information:: ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 10 Vol. 7; ISSN 2380-8195

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Carbazole-Based Hole Transport Polymer for Methylammonium-Free Tin-Lead Perovskite Solar Cells with Enhanced Efficiency and Stability

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Carbazole-Based Hole Transport Polymer for Methylammonium-Free Tin–Lead Perovskite Solar Cells with Enhanced Efficiency and Stability

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