Black Phosphorus Quantum Dot-Engineered Tin Oxide Electron Transport Layer for Highly Stable Perovskite Solar Cells with Negligible Hysteresis

• DOI: 10.1021/acsami.1c22097
• Publication Date: 2022-02-16T17:52:45Z
• Authors: Bangkai Gu; Yi Du; Bo Chen; Run Zhao; Hao Lu; Qingyu Xu; Chunxian Guo
• Keywords: Hysteresis; Tin oxide; Perovskite solar cell

An effective combination of smart materials plays an important role in charge transfer and separation for high photoelectric conversion efficiency (PCE) stable solar cells. Black phosphorus quantum dots (BPQDs) have been revealed as a direct band gap semiconductor with ultrahigh conductivity, which explored the present work additive component to precursor solution SnO2 nanoparticles that can effectively improve performance electron transport layer (ETL)-based perovskite Such device yield PCE 21% SnO2/BPQDs mixed ETL, is higher than those cells based on single (18.2%), BPQDs/SnO2 bilayer (19.5%), (20.5%) samples. The samples still possess good stability more 90% after 1000 h under AM 1.5G lamp irradiation negligible hysteresis. It found strong interaction BPQDs not only modify defects inherent but also inhibit oxidation BPQDs. This provides promising functional material ETL-based proves BPQD-based modification strategy useful designing other performance.