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Waterproof flexible InP@ZnSeS quantum dot light-emitting diode

Shin, Dong-Wook, Suh, Yo-Han, Lee, Sanghyo, Hou, Bo ORCID:, Han, Soo Deok, Cho, Yuljae, Fan, Xiang-Bing, Bang, Sang Yun, Zhan, Shijie, Yang, Jiajie, Choi, Hyung Woo, Jung, Sungmin, Mocanu, Felix C., Lee, Hanleem, Occhipinti, Luigi, Chun, Young Tea, Amaratunga, Gehan and Kim, Jong Min 2020. Waterproof flexible InP@ZnSeS quantum dot light-emitting diode. Advanced Optical Materials 8 (6) , 1901362. 10.1002/adom.201901362

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The development of flexible displays for wearable electronics applications has created demand for high‐performance quantum dot (QD) light‐emitting diodes (QLEDs) based on QD core@shell structures. Emerging indium phosphide (InP)‐based core@shell QDs show promise as lighting material in the field of optoelectronics because they are environmentally friendly material, can be produced in a cost‐effective manner, and are capable of tunable emission. While efforts have been made to enhance the performance of InP‐based QLED, the stabilities of InP@ZnSeS QDs film and InP@ZnSeS‐based QLED in water/air are not yet fully understood, limiting their practical applications. Herein, a highly durable, flexible InP@ZnSeS QLED encapsulated in an ultrathin film of CYTOP, a solution‐based amorphous fluoropolymer, is demonstrated. The CYTOP‐encapsulated green flexible QLED shows an external quantum efficiency (EQE) of 0.904% and a high luminescence of 1593 cd m−2 as well as outstanding waterproof performance. The flexible device emits strong luminescence after being immersed in water for ≈20 min. Even when subjected to continuous tensile stress with a 5 mm bending radius, the high luminescence is preserved. This waterproof architecture can be a promising strategy for wearable electronics applications.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Wiley
ISSN: 2195-1071
Date of First Compliant Deposit: 24 February 2020
Last Modified: 07 Nov 2023 01:25

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