PRI Research Seminar Series on 1 Dec 2023 (Fri) - Perovskite Light-Emitting Devices

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Perovskite Light-Emitting Devices

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This study focuses on developing efficient sky-blue and green perovskite light-emitting diodes (PeLEDs) by regulating their phase distribution via anti-solvent treatment and introducing potassium bromide (KBr). A notable increase in external quantum efficiency (EQE) is achieved by manipulating conformational disorder among its organic cations. The anti-solvent tailors phases distribution, resulting in efficient luminescence. KBr suppresses trap density and improves the photoluminescence quantum yield (PLQY) of inorganic CsPbBr3 PeLEDs, promising high EL efficiencies and performance stability. Furthermore, the conformational disorder of organic cation improves dielectric mismatch, thereby enhancing exciton properties and radiative recombination efficiency. Employing such strategies can improve the efficiency of PeLEDs, potentializing applications in next-generation optoelectronic devices.

_^Biography

Prof. Shu Ping LAU is the head of the Department of Applied Physics at The Hong Kong Polytechnic University and a Fellow of the American Physical Society. He oversees the University Research Facility in Materials Characterization and Device Fabrication and is renowned for his cutting-edge research in nanomaterials and energy materials. Prof Lau has contributed significantly to our understanding of nanostructured semiconductor materials and their applications, garnering over 26,500 citations across over 400 published papers. He focuses on green energy projects, including developing green hydrogen and CO2 reduction platforms.