[논문]Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot

Kim, Hobeom; Kim, Joo Sung; Heo, Jung-Min; Pei, Mingyuan; Park, In-Hyeok; Liu, Zhun; Yun, Hyung Joong; Park, Min-Ho; Jeong, Su-Hun; Kim, Young-Hoon; Park, Jin-Woo; Oveisi, Emad; Nagane, Satyawan; Sadhanala, Aditya; Zhang, Lijun; Kweon, Jin Jung; Lee, Sung Keun; Yang, Hoichang; Jang, Hyun Myung; Friend, Richard H.; Loh, Kian Ping; Nazeeruddin, Mohammad Khaja; Park, Nam-Gyu; Lee, Tae-Woo

doi:10.1038/s41467-020-17072-0

[해외논문] Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot 원문보기

Nature communications, v.11 no.1 = v.11, 2020년, pp.3378 -

Kim, Hobeom (Department of Materials Science and Engineering, Seoul National University, Seoul, 08826 Republic of Korea) , Kim, Joo Sung (Department of Materials Science and Engineering, Seoul National University, Seoul, 08826 Republic of Korea) , Heo, Jung-Min (Department of Materials Science and Engineering, Seoul National University, Seoul, 08826 Republic of Korea) , Pei, Mingyuan (Department of Chemical Engineering, Inha University, Incheon, 22212 Republic of Korea) , Park, In-Hyeok (Department of Chemistry, National University of Singapore, Singapore, 117543 Singapore) , Liu, Zhun (State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Automobile Materials of MOE and College of Materials Science and Engineering, Jilin University, Changchun, 130012 China) , Yun, Hyung Joong (Research Center for Materials Analysis, Korea Basic Science Institute (KBSI), Daejeon, 34133 Republic of Korea) , Park, Min-Ho (Department of Materials Science and Engineering, Seoul National University, Seoul, 08826 Republic of Korea) , Jeong, Su-Hun (Department of Materials Science and Engineering, Seoul National University, Seoul,) , Kim, Young-Hoon , Park, Jin-Woo , Oveisi, Emad , Nagane, Satyawan , Sadhanala, Aditya , Zhang, Lijun , Kweon, Jin Jung , Lee, Sung Keun , Yang, Hoichang , Jang, Hyun Myung , Friend, Richard H. , Loh, Kian Ping , Nazeeruddin, Mohammad Khaja , Park, Nam-Gyu , Lee, Tae-Woo

Abstract ▼ AI-Helper

Perovskite light-emitting diodes (PeLEDs) based on three-dimensional (3D) polycrystalline perovskites suffer from ion migration, which causes overshoot of luminance over time during operation and reduces its operational lifetime. Here, we demonstrate 3D/2D hybrid PeLEDs with extremely reduced luminance overshoot and 21 times longer operational lifetime than 3D PeLEDs. The luminance overshoot ratio of 3D/2D hybrid PeLED is only 7.4% which is greatly lower than that of 3D PeLED (150.4%). The 3D/2D hybrid perovskite is obtained by adding a small amount of neutral benzylamine to methylammonium lead bromide, which induces a proton transfer from methylammonium to benzylamine and enables crystallization of 2D perovskite without destroying the 3D phase. Benzylammonium in the perovskite lattice suppresses formation of deep-trap states and ion migration, thereby enhances both operating stability and luminous efficiency based on its retardation effect in reorientation.Ion migration can induce overshoot of luminance in normal 3D perovskite light-emitting diode devices and results in reduced lifetime. Here Kim et al. show that the ion migration and overshoot can be suppressed in 3D/2D hybrid perovskites, leading to 21 times longer operational lifetime.

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