Highly Thermotolerant Metal Halide Perovskite Solids |
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Authors: | Huiwang Lian Yang Li Kaniyarakkal Sharafudeen Weiren Zhao Gopi R Krishnan Shaoan Zhang Jianrong Qiu Kai Huang Gang Han |
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Affiliation: | 1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006 China;2. Kuwait College Science and Technology, Doha, 27335 Kuwait;3. Department of Physics, NSS College Pandalam, Pathanamthitta, Kerala, 689501 India;4. School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou, 510665 China;5. State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058 China;6. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605 USA |
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Abstract: | By virtue of their narrow emission bands, near-unity quantum yield, and low fabrication cost, metal halide perovskites hold great promise in numerous aspects of optoelectronic applications, including solid-state lighting, lasing, and displays. Despite such promise, the poor temperature tolerance and suboptimal quantum yield of the existing metal halide perovskites in their solid state have severely limited their practical applications. Here, a straightforward heterogeneous interfacial method to develop superior thermotolerant and highly emissive solid-state metal halide perovskites is reported and their use as long-lasting high-temperature and high-input-power durable solid-state light-emitting diodes is illustrated. It is found that the resultant materials can well maintain their superior quantum efficiency after heating at a temperature over 150 °C for up to 22 h. A white light-emitting diode (w-LED) constructed from the metal halide perovskite solid exhibits superior temperature sustainable lifetime over 1100 h. The w-LED also displays a highly durable high-power-driving capability, and its working current can go up to 300 mA. It is believed that such highly thermotolerant metal halide perovskites will unleash the possibility of a wide variety of high-power and high-temperature solid-state lighting, lasing, and display devices that have been limited by existing methods. |
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Keywords: | enhanced stability heterogeneous interfacial method solid-state metal halide perovskites superior thermotolerance |
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