https://scholars.lib.ntu.edu.tw/handle/123456789/425062
Title: | Engineering of perovskite light-emitting diodes based on quasi-2D perovskites formed by diamine cations | Authors: | Chen, Chiung Han Li, Zhenchao Xue, Q. Su, Yu An Lee, Chia Chen Yip, Hin Lap WEN-CHANG CHEN CHU-CHEN CHUEH |
Keywords: | Diamine cation | Dion-Jacobson phase | Light-emitting diode | Quasi-2D perovskites;Diamine cation; Dion-Jacobson phase; Light-emitting diode; Quasi-2D perovskites | Issue Date: | 1-Dec-2019 | Journal Volume: | 75 | Source: | Organic Electronics | Abstract: | © 2019 Elsevier B.V. Thus far, most of the layered quasi-2D perovskite materials exploited in the perovskite light-emitting diodes (PeLEDs) are based on large-size monoamine cations, which forms a bilayered organic barrier between the perovskite sheets (known as the Ruddlesden-Popper (RP) phase). However, the organic spacer between the perovskite sheets can be composed of a single-layer diamine cation, for which the perovskite sheets might possess a strengthened connection due to the direct linkage of the diamine cation (referred as the Dion-Jacobson (DJ) phase). Until now, the studies of PeLEDs based on the DJ phase 2D perovskite materials are still rare. Herein, a series of DJ phase quasi-2D EDBE(MAPbBr3)n-1PbBr4 perovskites [EDBE: 2,2-(ethylenedioxy)bis(ethylammonium)] is developed and their application in PeLEDs is investigated. Interestingly, different to the broad emission of the 2D EDBEPbBr4 film, the quasi-2D film exhibited a narrow emission, indicating a decreased lattice torsion and trap states. After careful device engineering, a green light-emitting perovskite LED based on the EDBE(MAPbBr3)2PbBr4 film is demonstrated to deliver a maximum luminescence of 1903 cd m−2 and a maximum EQE of 1.06%. We note such performance is inferior to the existing RP phase 2D perovskite, which is limited by the poor thermal stability of the studied EDBE-based 2D perovskites. Thus far, most of the layered quasi-2D perovskite materials exploited in the perovskite light-emitting diodes (PeLEDs) are based on large-size monoamine cations, which forms a bilayered organic barrier between the perovskite sheets (known as the Ruddlesden-Popper (RP) phase). However, the organic spacer between the perovskite sheets can be composed of a single-layer diamine cation, for which the perovskite sheets might possess a strengthened connection due to the direct linkage of the diamine cation (referred as the Dion-Jacobson (DJ) phase). Until now, the studies of PeLEDs based on the DJ phase 2D perovskite materials are still rare. Herein, a series of DJ phase quasi-2D EDBE(MAPbBr3)n-1PbBr4 perovskites [EDBE: 2,2-(ethylenedioxy)bis(ethylammonium)] is developed and their application in PeLEDs is investigated. Interestingly, different to the broad emission of the 2D EDBEPbBr4 film, the quasi-2D film exhibited a narrow emission, indicating a decreased lattice torsion and trap states. After careful device engineering, a green light-emitting perovskite LED based on the EDBE(MAPbBr3)2PbBr4 film is demonstrated to deliver a maximum luminescence of 1903 cd m−2 and a maximum EQE of 1.06%. We note such performance is inferior to the existing RP phase 2D perovskite, which is limited by the poor thermal stability of the studied EDBE-based 2D perovskites. © 2019 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/425062 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85070625443&doi=10.1016%2fj.orgel.2019.105400&partnerID=40&md5=c01a3cf0a1d52ae496c21156927d604a |
ISSN: | 15661199 | DOI: | https://api.elsevier.com/content/abstract/scopus_id/85070625443 10.1016/j.orgel.2019.105400 |
SDG/Keyword: | Amines; Diodes; Light; Light emitting diodes; Positive ions; Sulfur compounds; Thermodynamic stability; Device engineering; Dion-Jacobson phase; Green light; Organic barriers; Organic spacers; Quasi-2d; Ruddlesden-Popper; Single layer; Perovskite |
Appears in Collections: | 化學工程學系 |
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