120 mm Single-crystalline perovskite and wafers: towards viable applications
As the large single-crystalline silicon wafers have revolutionized many industries including electronics and solar cells, it is envisioned that the availability of large single-crystalline perovskite crystals and wafers will revolutionize its broad applications in photovoltaics, optoelectronics, las...
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Published in | 中国科学:化学英文版 no. 10; pp. 1367 - 1376 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
2017
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Online Access | Get full text |
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Summary: | As the large single-crystalline silicon wafers have revolutionized many industries including electronics and solar cells, it is envisioned that the availability of large single-crystalline perovskite crystals and wafers will revolutionize its broad applications in photovoltaics, optoelectronics, lasers, photodetectors, light emitting diodes(LEDs), etc. Here we report a method to grow large single-crystalline perovskites including single-halide crystals: CH3NH3PbX3(X=I, Br, Cl), and dual-halide ones:CH3NH3Pb(ClxBr1.x)3 and CH3NH3Pb(BrxI1.x)3, with the largest crystal being 120 mm in length. Meanwhile, we have advanced a process to slice the large perovskite crystals into thin wafers. It is found that the wafers exhibit remarkable features:(1)its trap-state density is a million times smaller than that in the microcrystalline perovskite thin films(MPTF);(2) its carrier mobility is 410 times higher than its most popular organic counterpart P3HT;(3) its optical absorption is expanded to as high as910 nm comparing to 797 nm for the MPTF;(4) while MPTF decomposes at 150 °C, the wafer is stable at high temperature up to270 °C;(5) when exposed to high humidity(75% RH), MPTF decomposes in 5 h while the wafer shows no change for overnight;(6) its photocurrent response is 250 times higher than its MPTF counterpart. A few electronic devices have been fabricated using the crystalline wafers. Among them, the Hall test gives low carrier concentration with high mobility. The trap-state density is measured much lower than common semiconductors. Moreover, the large SC-wafer is found particularly useful for mass production of integrated circuits. By adjusting the halide composition, both the optical absorption and the light emission can be fine-tuned across the entire visible spectrum from 400 nm to 800 nm. It is envisioned that a range of visible lasers and LEDs may be developed using the dual-halide perovskites. With fewer trap states, high mobility, broader absorption, and humidity resistance, it is expected that solar cells with high stable efficiency maybe attainable using the crystalline wafers. |
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Bibliography: | Yucheng Liu;Xiaodong Ren;Jing Zhang;Zhou Yang;Dong Yang;Fengyang Yu;Jiankun Sun;Changming Zhao;Zhun Yao;Bo Wang;Qingbo Wei;Fengwei Xiao;Haibo Fan;Hao Deng;Liangping Deng;Shengzhong (Frank) Liu;Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education;Shaanxi Key Laboratory for Advanced Energy Devices;Shaanxi Engineering Laboratory for Advanced Energy Technology;School of Materials Science and Engineering,Shaanxi Normal University;iChEM, Dalian National Laboratory for Clean Energy;Dalian Institute of Chemical Physics, Chinese Academy of Sciences;Xi’an LONGI Silicon Materials Corporation 11-5839/O6 |
ISSN: | 1674-7291 1869-1870 |