Quantum-size-tuned heterostructures enable efficient and stable inverted perovskite solar cells

Hao Chen, Sam Teale, Bin Chen, Yi Hou, Luke Grater, Tong Zhu, Koen Bertens, So Min Park, Harindi R. Atapattu, Yajun Gao, Mingyang Wei, Andrew K. Johnston, Qilin Zhou, Kaimin Xu, Danni Yu, Congcong Han, Teng Cui, Eui Hyuk Jung, Chun Zhou, Wenjia ZhouAndrew H. Proppe, Sjoerd Hoogland, Frédéric Laquai, Tobin Filleter, Kenneth R. Graham, Zhijun Ning, Edward H. Sargent

Research output: Contribution to journalArticlepeer-review

267 Scopus citations

Abstract

The energy landscape of reduced-dimensional perovskites (RDPs) can be tailored by adjusting their layer width (n). Recently, two/three-dimensional (2D/3D) heterostructures containing n = 1 and 2 RDPs have produced perovskite solar cells (PSCs) with >25% power conversion efficiency (PCE). Unfortunately, this method does not translate to inverted PSCs due to electron blocking at the 2D/3D interface. Here we report a method to increase the layer width of RDPs in 2D/3D heterostructures to address this problem. We discover that bulkier organics form 2D heterostructures more slowly, resulting in wider RDPs; and that small modifications to ligand design induce preferential growth of n ≥ 3 RDPs. Leveraging these insights, we developed efficient inverted PSCs (with a certified quasi-steady-state PCE of 23.91%). Unencapsulated devices operate at room temperature and around 50% relative humidity for over 1,000 h without loss of PCE; and, when subjected to ISOS-L3 accelerated ageing, encapsulated devices retain 92% of initial PCE after 500 h.

Original languageEnglish
Pages (from-to)352-358
Number of pages7
JournalNature Photonics
Volume16
Issue number5
DOIs
StatePublished - May 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature Limited.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Quantum-size-tuned heterostructures enable efficient and stable inverted perovskite solar cells'. Together they form a unique fingerprint.

Cite this