Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-07440-2
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Funding
- National Key Research and Development Program of China [2017YFA0204800]
- Fundamental Research Funds for the Central Universities [GK201803012]
- National Natural Science Foundation of China [91733301, 61604092, 61674098]
- 111 Project [B14041]
- Changjiang Scholar and Innovative Research Team [IRT_14R33]
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JM5132]
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Single crystalline perovskites exhibit high optical absorption, long carrier lifetime, large carrier mobility, low trap-state-density and high defect tolerance. Unfortunately, all single crystalline perovskites attained so far are limited to bulk single crystals and small area wafers. As such, it is impossible to design highly demanded flexible single-crystalline electronics and wearable devices including displays, touch sensing devices, transistors, etc. Herein we report a method of induced peripheral crystallization to prepare large area flexible single-crystalline membrane (SCM) of phenylethylamine lead iodide (C6H5C2H4NH3)(2)PbI4 with area exceeding 2500 mm(2) and thinness as little as 0.6 mu m. The ultrathin flexible SCM exhibits ultralow defect density, superior uniformity and long-term stability. Using the superior ultrathin membrane, a series of flexible photosensors were designed and fabricated to exhibit very high external quantum efficiency of 26530%, responsivity of 98.17 A W-1 and detectivity as much as 1.62 x 10(15) cm Hz(1/2) W-1 (Jones).
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