Solution-processed CuOx as an efficient hole-extraction layer for inverted planar heterojunction perovskite solar cells

Zhi Kai Yu, Wei Fei Fu, Wen Qing Liu, Zhong Qiang Zhang, Yu Jing Liu, Jie Lin Yan, Tao Ye, Wei Tao Yang, Han Ying Li, Hong Zheng Chen

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

A solution-processed CuOx film has been successfully integrated as the hole-transporting layer (HTL) for inverted planar heterojunction perovskite solar cells (PVSCs). The CuOx layer is fabricated by simply spin-coating a copper acetylacetonate (Cu(acac)2) chloroform solution onto ITO glass with high transparency in the visible range. The compact and pinhole-free perovskite film with large grain domains is grown on the CuOx film. The inverted PVSCs with the structure of ITO/CuOx/MAPbI3/PC61BM/ZnO/Al are fabricated and show a best PCE of 17.43% under standard AM 1.5G simulated solar irradiation with a VOC of 1.03 V, a JSC of 22.42 mA cm−2, and a fill factor of 0.76, which is significantly higher and more stable than that fabricated from the often used hole-transporting material PEDOT:PSS (11.98%) under the same experimental conditions. The enhanced performance is attributed to the efficient hole extraction through the CuOx layer as well as the high-quality CH3NH3PbI3 films grown on the CuOx. Our results indicate that low-cost and solution-processed CuOx film is a promising HTL for high performance PVSCs with better stability.

Original languageEnglish
Pages (from-to)13-18
Number of pages6
JournalChinese Chemical Letters
Volume28
Issue number1
DOIs
StatePublished - 1 Jan 2017
Externally publishedYes

Keywords

  • CuO
  • Hole-transporting layer
  • Perovskite solar cells
  • Solution-processing
  • Stable

Fingerprint

Dive into the research topics of 'Solution-processed CuOx as an efficient hole-extraction layer for inverted planar heterojunction perovskite solar cells'. Together they form a unique fingerprint.

Cite this