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- Title
Heterojunctions of Mercury Selenide Quantum Dots and Halide Perovskites with High Lattice Matching and Their Photodetection Properties.
- Authors
Yu, Chengye; Shan, Yufeng; Zhu, Jiaqi; Sun, Dingyue; Zheng, Xiaohong; Zhang, Na; Hou, Jingshan; Fang, Yongzheng; Dai, Ning; Liu, Yufeng
- Abstract
Heterojunction semiconductors have been extensively applied in various optoelectronic devices due to their unique carrier transport characteristics. However, it is still a challenge to construct heterojunctions based on colloidal quantum dots (CQDs) due to stress and lattice mismatch. Herein, HgSe/CsPbBrxI3−x heterojunctions with type I band alignment are acquired that are derived from minor lattice mismatch (~1.5%) via tuning the ratio of Br and I in halide perovskite. Meanwhile, HgSe CQDs with oleylamine ligands can been exchanged with a halide perovskite precursor, acquiring a smooth and compact quantum dot film. The photoconductive detector based on HgSe/CsPbBrxI3−x heterojunction presents a distinct photoelectric response under an incident light of 630 nm. The work provides a promising strategy to construct CQD-based heterojunctions, simultaneously achieving inorganic ligand exchange, which paves the way to obtain high-performance photodetectors based on CQD heterojunction films.
- Subjects
SEMICONDUCTOR nanocrystals; PEROVSKITE; OPTOELECTRONIC devices; HALIDES; HETEROJUNCTIONS
- Publication
Materials (1996-1944), 2024, Vol 17, Issue 8, p1864
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma17081864