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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.
Afiliación
  • Kim H; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
  • Kim JS; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
  • Heo JM; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
  • Pei M; Department of Chemical Engineering, Inha University, Incheon, 22212, Republic of Korea.
  • Park IH; Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore.
  • Liu Z; 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 HJ; Research Center for Materials Analysis, Korea Basic Science Institute (KBSI), Daejeon, 34133, Republic of Korea.
  • Park MH; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
  • Jeong SH; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
  • Kim YH; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
  • Park JW; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
  • Oveisi E; Interdisciplinary Centre for Electron Microscopy (CIME), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1951, Switzerland.
  • Nagane S; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
  • Sadhanala A; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
  • Zhang L; Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK.
  • Kweon JJ; Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore, 560012, India.
  • Lee SK; 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.
  • Yang H; School of Earth and Environmental Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
  • Jang HM; School of Earth and Environmental Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
  • Friend RH; Institute of Applied Physics, Seoul National University, Seoul, 08826, Republic of Korea.
  • Loh KP; Department of Chemical Engineering, Inha University, Incheon, 22212, Republic of Korea.
  • Nazeeruddin MK; Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea.
  • Park NG; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
  • Lee TW; Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore.
Nat Commun ; 11(1): 3378, 2020 Jul 06.
Article en En | MEDLINE | ID: mdl-32632144
ABSTRACT
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.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article
Texto completo
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article