Enhanced charge separation and photocatalytic hydrogen evolution in carbonized-polymer-dot-coupled lead halide perovskites
| العنوان: | Enhanced charge separation and photocatalytic hydrogen evolution in carbonized-polymer-dot-coupled lead halide perovskites |
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| المؤلفون: | Hao Zhang, Haotong Wei, Tanglue Feng, Bai Yang, Qingsen Zeng, Yajie Zhao, Yue Yu, Yue Zhao, Yi Li, Zhenhui Kang, Zidong Wang, Chongming Liu, Junjun Liu, Shoujun Zhu |
| المصدر: | Materials Horizons. 7:2719-2725 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Materials science, Process Chemistry and Technology, Energy conversion efficiency, Halide, Quantum yield, Polymer, Photochemistry, Metal, chemistry.chemical_compound, chemistry, Mechanics of Materials, visual_art, visual_art.visual_art_medium, Photocatalysis, General Materials Science, Electrical and Electronic Engineering, Triiodide, Perovskite (structure) |
| الوصف: | Metal halide perovskites are promising candidates as photocatalysts due to their uniquely outstanding photophysical properties; however, the catalytic efficiency is limited by severe charge recombination. Herein, we show that carbonized polymer dots (CPDs) can act as an efficient charge modulator to stabilize photo-generated carriers in methylamine lead triiodide (MAPbI3) perovskites through ultra-fast hole transfer, and thus increase the rate of visible light-driven photocatalytic HI splitting 35-fold. The optimized CPD/MAPbI3/Pt hybrid photocatalytic system exhibits an impressive H2 evolution rate of 11 497 μmol h−1 g−1, a solar-to-hydrogen conversion efficiency of 2.15%, and an apparent quantum yield of 53.6% at 420 nm, which are among the highest values for metal halide perovskite photocatalysts. Moreover, the presented strategy of hole extraction via CPDs can be universally applied to improve the performance of previous electron-manipulated MAPbI3-based photocatalytic systems. The easy-to-prepare and bandedge-tunable CPDs with excellent charge-transfer ability may bring new insights in developing high-performance perovskite photocatalysts. |
| تدمد: | 2051-6355 2051-6347 |
| DOI: | 10.1039/d0mh00955e |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6e59fd13605ad379b3670c768d9127e9 https://doi.org/10.1039/d0mh00955e |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........6e59fd13605ad379b3670c768d9127e9 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20516355 20516347 |
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| DOI: | 10.1039/d0mh00955e |