A monolithically integrated near-infrared imager with crystallization- and oxidation-modulated tin-lead perovskites
The fast crystallization and facile oxidation of Sn<sup>2+</sup> of tin-lead (Sn-Pb) perovskites are the biggest challenges for their applications in high-performance near-infrared (NIR) photodetectors and imagers. Here, we introduce a multifunctional diphenyl sulfoxide (DPSO) molecule into perovskite precursor ink to response these issues by revealing its strong binding interactions with the precursor species. The regulated perovskite film exhibits a dense morphology, reduced defect density and prolonged carrier diffusion length. The manufactured self-powered photodetector realizes a spectral response of 300-1100 nm, dark current density of 4.7 × 10<sup>-8</sup> mA cm<sup>-2</sup>, peak responsivity of 0.49 A W<sup>-1</sup> and specific detectivity of 1.20 × 10<sup>12</sup> Jones in NIR region (780-1100 nm), -3 dB bandwidth of 11.4 MHz, linear dynamic range of 174 dB, and ultrafast rise/fall time of 14.2/17.1 ns, respectively. We demonstrate a 64 × 64 NIR imager with an impressive spatial resolution of 1.32 lp mm<sup>-1</sup> by monolithically integrating the photodetector with a commercial thin-film transistor readout circuit.
Authors
- Haotian Bao
- Zhichun Yang (ORCID: https://orcid.org/0000-0002-1613-5984)
- Zhihao Chen (ORCID: https://orcid.org/0009-0000-1770-5398)
- Ruiyun Chen (ORCID: https://orcid.org/0000-0002-0037-856X)
- Shuangping Han
- Zonghao Liu (ORCID: https://orcid.org/0000-0003-4743-6971)
- Zaiwei Wang (ORCID: https://orcid.org/0000-0001-9725-0206)
- Chengbing Qin (ORCID: https://orcid.org/0000-0002-6822-5113)
- Wei Chen (ORCID: https://orcid.org/0000-0002-2418-9210)
- Jingjing Liu (ORCID: https://orcid.org/0000-0002-7862-9234)
- Xiangdong Li (ORCID: https://orcid.org/0000-0002-4044-2888)
- Liantuan Xiao (ORCID: https://orcid.org/0000-0003-2690-6460)
- Guofeng Zhang (ORCID: https://orcid.org/0000-0002-9030-0431)
- Jianyong Hu (ORCID: https://orcid.org/0000-0001-5919-3909)
- Suotang Jia (ORCID: https://orcid.org/0000-0001-9610-3386)
Institutions
- Shanxi University (CN)
- Wuhan National Laboratory for Optoelectronics (CN)
- Shenzhen Technology University (CN)
- Huazhong University of Science and Technology (CN)
- Taiyuan University of Technology (CN)
Publication Details
- Journal
- Light Science & Applications
- Published
- 2025-09-04
- DOI
- https://doi.org/10.1038/s41377-025-01987-8
- Citations
- 1
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- National Natural Science Foundation of China
- Ministry of Education of the People's Republic of China
- Huazhong University of Science and Technology
- Taiyuan University of Technology
- Wuhan National Laboratory for Optoelectronics
- Shenzhen University
- Changjiang Scholar Program of Chinese Ministry of Education
- National Key Research and Development Program of China