Ultra-stable all-inorganic silver bismuth sulfide colloidal nanocrystal photovoltaics using pin type architecture

Jae Taek Oh, Sung Yong Bae, Jonghee Yang, Su Ryong Ha, Hochan Song, Cheong Beom Lee, Sanchari Shome, Swarup Biswas, Hyun Mo Lee, You Hyun Seo, Seok In Na, Jin Seong Park, Whikun Yi, Seungjin Lee, Koen Bertens, Bo Ram Lee, Edward H. Sargent, Hyeok Kim*, Younghoon Kim, Hyosung Choi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Silver bismuth sulfide (AgBiS2) colloidal nanocrystals (NCs) have emerged as an environmentally friendly light absorber for next-generation photovoltaics. Classical AgBiS2 NC photovoltaics with nip-architecture have been mandated to use a combination of polymer and molybdenum oxide as a hole transport layer (HTL), which are vulnerable to oxygen, heat and water. In this work, we develop all-inorganic AgBiS2 NC photovoltaics with pin-architecture, serving a nickel oxide (NiO) as HTL. We also employ a cascade-energy-level alignment by introducing 3-mercaptopropionic acid-treated AgBiS2 NC layer, enabling enhanced hole collection with minimized interfacial recombination. As a result, the pin type AgBiS2 NC photovoltaics demonstrate a power conversion efficiency of 5.59% as well as excellent stability even under extreme conditions such as heat and water exposures, attributed to superior chemical robustness of the inorganic HTL. This work is the first report on AgBiS2 NC device with all-inorganic components and achieves the highest device efficiency in pin type AgBiS2 NC photovoltaics.

Original languageEnglish (US)
Article number230585
JournalJournal of Power Sources
Volume514
DOIs
StatePublished - Dec 1 2021

Funding

This work was supported by National Research Foundation of Korea ( NRF-2018R1C1B6001015 ). This work was also funded by National Research Foundation (NRF) of Korea (Grants NRF-2020R1A4A1018163 ) under the program of Basic Research Laboratory (BRL).

Keywords

  • All-inorganic photovoltaics
  • Device stability
  • Environmental-friendly
  • Ligand engineering
  • Silver bismuth sulfide

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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