Boosting Efficiency in Polycrystalline Metal Halide Perovskite Light-Emitting Diodes
| Autor: | Tae-Woo Lee, Joo Sung Kim, Su-Hun Jeong, Jung-Min Heo, Min-Ho Park, Soyeong Ahn |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry Optical engineering Energy Engineering and Power Technology Halide 02 engineering and technology Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Fuel Technology Chemistry (miscellaneous) law Materials Chemistry OLED Optoelectronics Crystallite 0210 nano-technology business Light-emitting diode Perovskite (structure) Diode |
| Zdroj: | ACS Energy Letters. 4:1134-1149 |
| ISSN: | 2380-8195 |
| Popis: | Metal halide perovskites (MHPs) have outstanding photophysical properties and are therefore being evaluated as next-generation light emitters. Within just a few years, the efficiencies of polycrystalline perovskite light-emitting diodes (PeLEDs) have been drastically improved and are catching up with those of conventional organic LEDs. The electroluminescence efficiency of polycrystalline PeLEDs has been limited by shortcomings such as limited outcoupling efficiency, charge imbalance in MHP emitting layers, difficulty controlling surface morphology, small exciton binding energy at room temperature, and nonradiative recombination at defect sites. In this Perspective, we focus on promising strategies such as optical engineering, charge balance control, morphological and nanograin engineering, and chemical modification to overcome these shortcomings and suggest future directions for research to further improve the efficiencies of polycrystalline PeLEDs. |
| Databáze: | OpenAIRE |
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