Textured CH3NH3PbI3thin film with enhanced stability for high performance perovskite solar cells

Mingzhu Long, Tiankai Zhang, Houyu Zhu, Guixia Li, Feng Wang, Wenyue Guo, Yang Chai, Wei Chen, Qiang Li, Kam Sing Wong, Jianbin Xu, Keyou Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

61 Citations (Scopus)

Abstract

Herein, we report a high crystallinity perovskite MAPbI3with texture structure prepared from HPbI3reacted with low partial pressure (LPP) MA gas, that has substantially higher both thermal and moisture stability than polycrystalline perovskite (PP) prepared from MAI+PbI2. A prototype reactor is developed to perform coordination engineering between MA vapor and HPbI3solid and facilitate the large-scale fabrication. The large Pb-N binding energy (~80.04 kJ mol−1) results in the liquefied state after MA adhesion. Finally, a high texture perovskite (TP) is formed after excess MA expeditious releasing. The MA-rich passivation through Pb-N bonding at interface and boundary contributes to the substantial improved stability. Besides, MA-rich species trigger an anti-degradation reaction in presence of moisture and thus endow stability above two months under ~65% humidity. The textured PSCs (TPSCs) deliver power conversion efficiency (PCE) between 15.5% and champion 18.9% in the batch deposition. Therefore, the coordination engineering improves the efficiency, stability, scalability and ease of fabrication together.
Original languageEnglish
Pages (from-to)485-496
Number of pages12
JournalNano Energy
Volume33
DOIs
Publication statusPublished - 1 Mar 2017

Keywords

  • Colloidal intermediate state
  • High crystallinity
  • High stability
  • Methylamine vapor
  • Perovskite solar cell
  • Texture perovskite

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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