@article{040cfa5643514e9e9ee2a0a93f9a7865,
title = "Improved efficiency and air stability of two-dimensional p-i-n inverted perovskite solar cells by Cs doping",
abstract = "Two-dimensional perovskite solar cells (2-D PSCs) have attracted much research attention in recent years because they are more stable in a regular environment than three-dimensional (3-D) ones are. In this study, we doped Cs into 2D perovskite (BA2(MA)2Pb3I10) films as the absorbing layers of the 2-D p-i-n inverted PSCs to investigate the influence of the Cs doping concentration on the properties of the 2-D perovskite films and the fabricated solar cells. Cs doping clearly improves the power conversion efficiency (PCE) and air stability of the PSCs. Doping perovskite with 10% Cs (the best doping concentration in this study) can increase the PSC efficiency from 7.98% to 10.11%. Scanning electron microscopy indicates the improved surface quality and crystallinity by Cs doping. However, excess Cs doping degrades the PCE of the PSCs. Furthermore, 10% Cs doped PSCs show air stability superior to that of undoped ones in unpackaged humidity environments. After exposure to 55% relative humidity (RH) in 19 °C air for 300 h, the PCE of the PSC decreased by only 39%, in contrast to 84% for the undoped PSC.",
author = "Hsieh, {Tzu Chien} and Shih, {Chung Yueh} and Chao, {Yu Chiang} and Cheng, {I. Chun} and Chen, {Jian Zhang}",
note = "Funding Information: JZC gratefully acknowledges the funding support from “Advanced Research Center for Green Materials Science and Technology” from The Featured Area Research Center Program of the Higher Education Sprout Project by the Ministry of Education (110L9006) and the Ministry of Science and Technology in Taiwan (MOST 110-2634-F-002-043 and MOST 108-2221-E-002-088-MY3). YCC thanks the Ministry of Science and Technology of Taiwan for funding support (MOST 106-2112-M-003-016-MY3 and MOST 108-2923-M-003-001-MY3). ICC and YCC gratefully acknowledge funding support from National Taiwan University System Young Scholar Innovative Collaboration Program under grant no. NTU-IOTP-109PNTUS04. We would like to thank Ms. Yuan-Tze Lee for her assistance with the SEM operation at the Instrument Center of National Taiwan University. XRD was conducted at the Precious Instrumentation Center of National Taiwan University of Science and Technology. Funding Information: JZC gratefully acknowledges the funding support from ?Advanced Research Center for Green Materials Science and Technology? from The Featured Area Research Center Program of the Higher Education Sprout Project by the Ministry of Education (110L9006) and the Ministry of Science and Technology in Taiwan (MOST 110-2634-F-002-043 and MOST 108-2221-E-002-088-MY3). YCC thanks the Ministry of Science and Technology of Taiwan for funding support (MOST 106-2112-M-003-016-MY3 and MOST 108-2923-M-003-001-MY3). ICC and YCC gratefully acknowledge funding support from National Taiwan University System Young Scholar Innovative Collaboration Program under grant no. NTU-IOTP-109PNTUS04. We would like to thank Ms. Yuan-Tze Lee for her assistance with the SEM operation at the Instrument Center of National Taiwan University. XRD was conducted at the Precious Instrumentation Center of National Taiwan University of Science and Technology. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.",
year = "2021",
month = jun,
day = "7",
doi = "10.1039/d1ra02574k",
language = "English",
volume = "11",
pages = "20200--20206",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "Royal Society of Chemistry",
number = "33",
}