Efficient and stable large-area perovskite solar cells with inorganic perovskite/carbon quantum dot-graded heterojunction

Qiang Sun, Cai Shen, Deyu Wang, Tao Zhang, Huaxia Ban, Yan Shen, Zhipan Zhang, Xiao Li Zhang, Guanjun Yang, Mingkui Wang

Research output: Journal PublicationArticlepeer-review

3 Citations (Scopus)

Abstract

This work reports on a compositionally graded heterojunction for photovoltaic application by cooperating fluorine-doped carbon quantum dots (FCQDs in short) into the CsPbI2.5Br0.5 inorganic perovskite layer. Using this CsPbI2.5Br0.5/FCQDs graded heterojunction in conjunction with low-temperature-processed carbon electrode, a power conversion efficiency of 13.53% for 1 cm2 all-inorganic perovskite solar cell can be achieved at AM 1.5G solar irradiation. To the best of our knowledge, this is one of the highest efficiency reported for carbon electrode based all-inorganic perovskite solar cells so far, and the first report of 1 cm2 carbon counter electrode based inorganic perovskite solar cell with PCE exceeding 13%. Moreover, the inorganic perovskite/carbon quantum dot graded heterojunction photovoltaics maintained over 90% of their initial efficiency after thermal aging at 85° for 1056 hours. This conception of constructing inorganic perovskite/FCQDs graded heterojunction offers a feasible pathway to develop efficient and stable photovoltaics for scale-up and practical applications.

Original languageEnglish
Article number9845067
JournalResearch
Volume2021
DOIs
Publication statusPublished - 2021
Externally publishedYes

ASJC Scopus subject areas

  • General

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