@article{77f59b2116b04b9f993936467f4d2d44,
title = "Spray coating of the PCBM electron transport layer significantly improves the efficiency of p-i-n planar perovskite solar cells",
abstract = "The p-i-n structure for perovskite solar cells has recently shown significant advantages in minimal hysteresis effects, and scalable manufacturing potential using lowerature solution processing. However, the power conversion efficiency (PCE) of the perovskite p-i-n structure remains low mainly due to limitations using a flat electron transport layer (ETL). In this work, we demonstrate a new approach using spray coating to fabricate the [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM) ETL. By creating a rough surface, we effectively improve the light trapping properties inside the PCBM ETL. We reveal that the spray coated PCBM can form a cross-linked network, which may facilitate better charge transport and enhance extraction efficiency. By improving the contact between the perovskite film and the PCBM ETL, a reduction in the trap states is observed resulting in a PCE increase from 13% to >17%.",
author = "Yifan Zheng and Jaemin Kong and Di Huang and Wei Shi and Lyndsey Mcmillon-Brown and Katz, {Howard E.} and Junsheng Yu and Taylor, {Andr{\'e} D.}",
note = "Funding Information: This research was funded by the Foundation of the National Natural Science Foundation of China (NSFC) (Grant No. 61675041), and the Foundation for Innovation Research Groups of the NSFC (Grant No. 61421002). The authors gratefully acknowledge the Chinese Scholarship Council (No. 201506070069) and National Science Foundation NSF-PECASE award (CBET-0954985) for partial support of this work. The Yale Institute for Nanoscience and Quantum Engineering (YINQE) and NSF MRSEC DMR 1119826 (CRISP) provided facility support. The author also thanks Prof. B. Rand and Dr Y. Lin for providing the diffuse reflection and transmission measurement. Funding Information: This research was funded by the Foundation of the National Natural Science Foundation of China (NSFC) (Grant No. 61675041), and the Foundation for Innovation Research Groups of the NSFC (Grant No. 61421002). The authors gratefully acknowledge the Chinese Scholarship Council (No. 201506070069) and National Science Foundation NSF-PECASE award (CBET-0954985) for partial support of this work. The Yale Institute for Nanoscience and Quantum Engineering (YINQE) and NSF MRSEC DMR 1119826 (CRISP) provided facility support.",
year = "2018",
month = jun,
day = "28",
doi = "10.1039/c8nr01763h",
language = "English (US)",
volume = "10",
pages = "11342--11348",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "24",
}