Energy Barrier Alignment for Efficient Perovskite Photodetectors Consisting of PEIE Combined With PCBM Electron Transport Layer
| Autor: | Dayong Zhang, Jiang Huang, Zijun Wang, Xiangdong Qin, Genjie Yang, Junsheng Yu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Photodetector 02 engineering and technology Photoelectric effect 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electron transport chain 0104 chemical sciences Electronic Optical and Magnetic Materials Electrode Optoelectronics Energy level Electrical and Electronic Engineering 0210 nano-technology business Absorption (electromagnetic radiation) Dark current Perovskite (structure) |
| Zdroj: | IEEE Journal of Photovoltaics. 11:362-367 |
| ISSN: | 2156-3403 2156-3381 |
| DOI: | 10.1109/jphotov.2020.3044131 |
| Popis: | A polyelectrolyte material of ethoxylated polyethylenimine (PEIE) was combined with the conventional electron transport material of [6, 6]-phenyl-C61-butyricacidmethylester (PCBM) as an electron transport layer (ETL), and high-performance perovskite photodetectors (PePDs) consisting of the PEIE:PCBM combination system as the ETL were fabricated. The PEIE:PCBM combined ETL could tune the energy barrier for invert injected hole charges between the interface of ETL and electrode. As a result, the reduced dark current and improved photoresponse of PePDs were realized. The results showed that the obtained devices possessed a high detectivity ( D *) of 4.77 × 1012 Jones, which was about three folds higher than that of controlled devices with pristine PCBM ETL. Meanwhile, the PePDs exhibited excellent recovery characteristics in light/dark conversion mode. Through a series of structure, morphology, and photoelectric characterization, the detailed mechanisms for the performance improvement of PePDs are disclosed. |
| Databáze: | OpenAIRE |
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