PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in a Planar Perovskite Solar Cell

Di Huang, Tenghooi Goh, Lyndsey McMillon-Brown, Jaemin Kong, Yifan Zheng, Jiao Zhao, Yang Li, Suling Zhao, Zheng Xu, André D. Taylor

Research output: Contribution to journalArticlepeer-review

Abstract

The successful commercialization of perovskite solar cells (Pvs-SCs) calls for the need to find low-temperature processable interlayers with outstanding charge-transport features. In this work, we strategically blend poly(2-ethyl-2-oxazoline) (PEOz) with PEDOT:PSS as the modified hole transport layer (HTL) to achieve high-efficiency P-I-N CH3NH3PbI3 Pvs-SCs. The PEOz-PEDOT:PSS HTL exhibits enhanced features over the conventional layer including the following: (1) promoting perovskite with enlarged grain sizes to decrease the perovskite layer's recombination, (2) increasing the work function of the HTL, and (3) decreasing the noncapacitive current in Pvs-SCs. Remarkably, we demonstrate a 17.39% power conversion efficiency with very low hysteresis and high Voc values of 1.075 V for Pvs-SCs with PEOz-PEDOT:PSS.

Original languageEnglish (US)
Pages (from-to)25329-25336
Number of pages8
JournalACS Applied Materials and Interfaces
Volume10
Issue number30
DOIs
StatePublished - Aug 1 2018

Keywords

  • PEDOT:PSS
  • PEOz
  • V
  • hysteresis
  • perovskite solar cells

ASJC Scopus subject areas

  • Materials Science(all)

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