Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes
| Autor: | Hongyu Yu, Wengqiang Yang, Ya Wang, Thomas P. Russell, Zheng-Hong Lu, Hang Zhou, Rui Zhu, Lichen Zhao, Taoyu Zou, Xiao-Yu Yang, Rui Su, Beng Xiang, Deying Luo |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Yield (engineering) Light detection business.industry 02 engineering and technology Carrier lifetime 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Photodiode law.invention Biomaterials law Electric field Electrode Electrochemistry Optoelectronics 0210 nano-technology business Minority carrier injection Perovskite (structure) |
| Zdroj: | Advanced Functional Materials. 30:2001692 |
| ISSN: | 1616-3028 1616-301X |
| DOI: | 10.1002/adfm.202001692 |
| Popis: | Author(s): Luo, D; Zou, T; Yang, W; Xiang, B; Yang, X; Wang, Y; Su, R; Zhao, L; Zhu, R; Zhou, H; Russell, TP; Yu, H; Lu, ZH | Abstract: Controlling defects and energy-band alignments are of paramount importance to the development of high-performance perovskite-based photodiodes. Yet, concurrent improvements in interfacial contacts and defect reduction simply by tailoring bottom contacts have not been investigated. An effective strategy is reported that can simultaneously improve energy-band alignments and structural defects by introducing low-dimensional contact (LDC) layers at the bottom interface. It is found that LDC-based perovskites considerably suppress undesirable structural defects induced by microstrains, resulting in reduced nonradiative recombination centers and improved carrier lifetimes. Additionally, the resulting LDC-based interface structures help block minority carrier injection from the electrodes by forming built-in electric fields. As a consequence, LDC-based perovskite photodiodes showed improved light detection capabilities. The result opens an avenue to yield highly efficient photodiodes. |
| Databáze: | OpenAIRE |
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