Ambipolar-transport wide-bandgap perovskite interlayer for organic photovoltaics with over 18% efficiency

Cenqi Yan, Jiangsheng Yu, Yuhao Li, Patrick W.K. Fong, Ran Ding, Kuan Liu, Hao Xia, Zhiwei Ren, Xinhui Lu, Jianhua Hao, Gang Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Anode interface layers (AILs) are of vital importance to the performance of organic photovoltaics (OPVs). Herein, MAPbBr3 is firstly demonstrated as an effective solution-processed AIL, featuring a 2.3-eV bandgap and high hole and electron mobility. PM6:BO-4Cl based on unannealed device with the MAPbBr3 AIL exhibits an encouraging efficiency of 15.5%. F4TCNQ is further doped into MAPbBr3 to increase work function and passivate defects, boosting the efficiency to 17.3%. Likewise, the unannealed devices based on PM6:BTP-eC9:PC71BM achieved a high efficiency of 18.3% with the MAPbBr3/F4TCNQ AIL. The ambipolar ability of MAPbBr3 in OPVs was further proved by inverted devices. Therefore, MAPbBr3 successfully serves multiple functions: a down-conversion layer, an energy donor, and a textured seeding layer influencing bulk-heterojunction (BHJ) morphology. This finding successfully demonstrates the practicability of wide-bandgap perovskite materials as highly promising OPV interfacial materials.

Original languageEnglish
Pages (from-to)2238-2250
Number of pages13
JournalMatter
Volume5
Issue number7
DOIs
Publication statusPublished - 6 Jul 2022

Keywords

  • ambipolar
  • interface engineering
  • MAP5: Improvement
  • organic photovoltaics

ASJC Scopus subject areas

  • Materials Science(all)

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