An Integrated Bulk and Surface Modification Strategy for Gas-Quenched Inverted Perovskite Solar Cells with Efficiencies Exceeding 22%

Xin Zhang, Weiming Qiu, Wenya Song, Zafer Hawash, Yaxin Wang, Bapi Pradhan, Yiyue Zhang, Denys Naumenko, Heinz Amenitsch, Ellen Moons, Tamara Merckx, Aranzazu Aguirre, Yaser Abdulraheem, Tom Aernouts, Yiqiang Zhan*, Yinghuan Kuang, Johan Hofkens, Jef Poortmans

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Inverted perovskite solar cells (PSCs) prepared by the antisolvent method have achieved power conversion efficiencies (PCEs) of over 23%, but they are not ideal for device upscaling. In contrast, gas-quenched PSCs offer great potential for upscaling, but their performance still lags behind. Herein, the gas-quenched films through both surface and bulk modifications are upgraded. First, a novel surface modifier, benzylammonium thiocyanate, is found to allow remarkably improved surface properties, but the PCE gain is limited by the existence of longitudinally multiple grains. Thus, methylammonium chloride additive as a second modifier to realize monolithic grains is further utilized. Such an integrated strategy enables the average open-circuit voltage of the gas-quenched PSCs to increase from 1.08 to 1.15 V, leading to a champion PCE of 22.3%. Moreover, the unencapsulated device shows negligible degradation after 150 h of maximum power point operation under simulated 1 sun illumination in N2.

Original languageEnglish
Article number2200053
JournalSolar RRL
Volume6
Issue number6
DOIs
Publication statusPublished - Jun 2022

Keywords

  • additive engineering
  • benzylammonium thiocyanate
  • gas quenching
  • inverted p–i–n perovskite solar cells
  • stabilities
  • surface treatments

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Fields of Expertise

  • Advanced Materials Science

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