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Title: Compositional and morphological engineering of mixed cation perovskite films for highly efficient planar and flexible solar cells with reduced hysteresis

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1398674
Grant/Contract Number:
FOA-0000990
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 35; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-08 15:40:39; Journal ID: ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Wang, Changlei, Zhao, Dewei, Yu, Yue, Shrestha, Niraj, Grice, Corey R., Liao, Weiqiang, Cimaroli, Alexander J., Chen, Jing, Ellingson, Randy J., Zhao, Xingzhong, and Yan, Yanfa. Compositional and morphological engineering of mixed cation perovskite films for highly efficient planar and flexible solar cells with reduced hysteresis. Netherlands: N. p., 2017. Web. doi:10.1016/j.nanoen.2017.03.048.
Wang, Changlei, Zhao, Dewei, Yu, Yue, Shrestha, Niraj, Grice, Corey R., Liao, Weiqiang, Cimaroli, Alexander J., Chen, Jing, Ellingson, Randy J., Zhao, Xingzhong, & Yan, Yanfa. Compositional and morphological engineering of mixed cation perovskite films for highly efficient planar and flexible solar cells with reduced hysteresis. Netherlands. doi:10.1016/j.nanoen.2017.03.048.
Wang, Changlei, Zhao, Dewei, Yu, Yue, Shrestha, Niraj, Grice, Corey R., Liao, Weiqiang, Cimaroli, Alexander J., Chen, Jing, Ellingson, Randy J., Zhao, Xingzhong, and Yan, Yanfa. Mon . "Compositional and morphological engineering of mixed cation perovskite films for highly efficient planar and flexible solar cells with reduced hysteresis". Netherlands. doi:10.1016/j.nanoen.2017.03.048.
@article{osti_1398674,
title = {Compositional and morphological engineering of mixed cation perovskite films for highly efficient planar and flexible solar cells with reduced hysteresis},
author = {Wang, Changlei and Zhao, Dewei and Yu, Yue and Shrestha, Niraj and Grice, Corey R. and Liao, Weiqiang and Cimaroli, Alexander J. and Chen, Jing and Ellingson, Randy J. and Zhao, Xingzhong and Yan, Yanfa},
abstractNote = {},
doi = {10.1016/j.nanoen.2017.03.048},
journal = {Nano Energy},
number = C,
volume = 35,
place = {Netherlands},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.nanoen.2017.03.048

Citation Metrics:
Cited by: 18works
Citation information provided by
Web of Science

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  • Cited by 16
  • Through detailed device characterization using cross-sectional Kelvin probe force microscopy (KPFM) and trap density of states measurements, we identify that the J-V hysteresis seen in planar organic-inorganic hybrid perovskite solar cells (PVSCs) using SnO 2 electron selective layers (ESLs) synthesized by low-temperature plasma-enhanced atomic-layer deposition (PEALD) method is mainly caused by the imbalanced charge transportation between the ESL/perovskite and the hole selective layer/perovskite interfaces. We find that this charge transportation imbalance is originated from the poor electrical conductivity of the low-temperature PEALD SnO 2 ESL. We further discover that a facile low-temperature thermal annealing of SnO 2 ESLs can effectivelymore » improve the electrical mobility of low-temperature PEALD SnO 2 ESLs and consequently significantly reduce or even eliminate the J-V hysteresis. With the reduction of J-V hysteresis and optimization of deposition process, planar PVSCs with stabilized output powers up to 20.3% are achieved. Here, the results of this study provide insights for further enhancing the efficiency of planar PVSCs.« less
  • We report on high-efficiency planar heterojunction perovskite solar cells (PSCs) employing Ni-doped alpha-Fe2O3 as electron-transporting layer (ETL). The suitable addition of nickel (Ni) dopant could enhance the electron conductivity as well as induce downward shift of the conduction band minimum for alpha-Fe2O3, which facilitate electrons injection and transfer from the conduction band of the perovskite. As a consequence, a substantial reduction in the charge accumulation at the perovskite/ETL interface makes the device much less sensitive to scanning rate and direction, i.e., lower hysteresis. With a reverse scan for the optimized PSC under standard AM-1.5 sunlight illumination, it generates a competitivemore » power conversion efficiency (PCE) of 14.2% with a large short circuit current (J(sc)) of 22.35 mA/cm(2), an open circuit photovoltage (V-oc) of 0.92 V and a fill factor (FF) of 69.1%. Due to the small J-V hysteresis behavior, a higher stabilized PCE up to 11.6% near the maximum power point can be reached for the device fabricated with 4 mol% Ni-doped alpha-Fe2O3 ETL compared with the undoped alpha-Fe2O3 based cell (9.2%). Furthermore, a good stability of devices with exposure to ambient air and high levels of ultraviolet (UV)-light can be achieved. Overall, our results demonstrate that the simple solution-processed Ni-doped alpha-Fe2O3 can be a good candidate of the n-type collection layer for commercialization of PSCs.« less
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