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 language | English (US) |
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Article number | 230585 |
Journal | Journal of Power Sources |
Volume | 514 |
DOIs | |
State | Published - 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