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Effective Small Organic Molecule as a Defect Passivator for Highly Efficient Quasi-2D Perovskite Light-Emitting Diodes.
Li, Ying; Li, Fuqiang; Yu, Zhongkai; Tamilavan, Vellaiappillai; Oh, Chang-Mok; Jeong, Woo Hyeon; Shen, Xinyu; Lee, Seongbeom; Du, Xiangrui; Yang, Eunhye; Ahn, Yoomi; Hwang, In-Wook; Lee, Bo Ram; Park, Sung Heum.
Afiliação
  • Li Y; Department of Physics, Pukyong National University, Busan, 48513, Republic of Korea.
  • Li F; Institute of Energy Transport and Fusion Research, Pukyong National University, Busan, 48513, Republic of Korea.
  • Yu Z; Department of Physics, Pukyong National University, Busan, 48513, Republic of Korea.
  • Tamilavan V; Institute of Energy Transport and Fusion Research, Pukyong National University, Busan, 48513, Republic of Korea.
  • Oh CM; School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.
  • Jeong WH; Department of Physics, Pukyong National University, Busan, 48513, Republic of Korea.
  • Shen X; Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
  • Lee S; School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.
  • Du X; School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.
  • Yang E; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, UK.
  • Ahn Y; Department of Physics, Pukyong National University, Busan, 48513, Republic of Korea.
  • Hwang IW; Department of Physics, Pukyong National University, Busan, 48513, Republic of Korea.
  • Lee BR; Institute of Energy Transport and Fusion Research, Pukyong National University, Busan, 48513, Republic of Korea.
  • Park SH; Department of Physics, Pukyong National University, Busan, 48513, Republic of Korea.
Small ; 20(23): e2308847, 2024 Jun.
Article em En | MEDLINE | ID: mdl-38174599
ABSTRACT
The use of a small organic molecular passivator is proven to be a successful strategy for producing higher-performing quasi-2D perovskite light-emitting diodes (PeLEDs). The small organic molecule can passivate defects on the grain surround and surface of perovskite crystal structures, preventing nonradiative recombination and charge trapping. In this study, a new small organic additive called 2, 8-dibromodibenzofuran (diBDF) is reported and examines its effectiveness as a passivating agent in high-performance green quasi-2D PeLEDs. The oxygen atom in diBDF, acting as a Lewis base, forms coordination bonds with uncoordinated Pb2+, so enhancing the performance of the device. In addition, the inclusion of diBDF in the quasi-2D perovskite results in a decrease in the abundance of low-n phases, hence facilitating efficient carrier mobility. Consequently, PeLED devices with high efficiency are successfully produced, exhibiting an external quantum efficiency of 19.9% at the emission wavelength of 517 nm and a peak current efficiency of 65.0 cd A-1.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Small Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Small Ano de publicação: 2024 Tipo de documento: Article