Planar heterojunction perovskite solar cells with superior reproducibility

Ye Jin Jeon, Sehyun Lee, Rira Kang, Jueng Eun Kim, Jun Seok Yeo, Seung Hoon Lee, Seok Soon Kim, Jin Mun Yun, Dong Yu Kim

Research output: Contribution to journalArticleResearchpeer-review

195 Citations (Scopus)

Abstract

Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies have rapidly increased to over 10%, and further improvements are expected. However, the poor device reproducibility of PeSCs ascribed to their inhomogeneously covered film morphology has hindered their practical application. Here, we demonstrate high-performance PeSCs with superior reproducibility by introducing small amounts of N-cyclohexyl-2-pyrrolidone (CHP) as a morphology controller into N,N-dimethylformamide (DMF). As a result, highly homogeneous film morphology, similar to that achieved by vacuum-deposition methods, as well as a high PCE of 10% and an extremely small performance deviation within 0.14% were achieved. This study represents a method for realizing efficient and reproducible planar heterojunction (PHJ) PeSCs through morphology control, taking a major step forward in the low-cost and rapid production of PeSCs by solving one of the biggest problems of PHJ perovskite photovoltaic technology through a facile method.

Original languageEnglish
Article number6953
Number of pages7
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 7 Nov 2014
Externally publishedYes

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