Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes
文献类型：期刊论文
| 作者 | Wang, CH; Han, DB; Wang, JH; Yang, YG; Liu, XY; Huang, S; Zhang, X; Chang, S; Wu, KF; Zhong, HZ |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2020 |
| 卷号 | 11期号:1页码:- |
| 关键词 | CH3NH3PBBR3 QUANTUM DOTS HALIDE PEROVSKITES ENERGY LANDSCAPE LUMINESCENT BRIGHT BR CSPBX3 CL |
| ISSN号 | 2041-1723 |
| DOI | 10.1038/s41467-020-20163-7 |
| 文献子类 | 期刊论文 |
| 英文摘要 | In the field of perovskite light-emitting diodes (PeLEDs), the performance of blue emissive electroluminescence devices lags behind the other counterparts due to the lack of fabrication methodology. Herein, we demonstrate the in situ fabrication of CsPbClBr2 nanocrystal films by using mixed ligands of 2-phenylethanamine bromide (PEABr) and 3,3-diphenylpropylamine bromide (DPPABr). PEABr dominates the formation of quasi-two-dimensional perovskites with small-n domains, while DPPABr induces the formation of large-n domains. Strong blue emission at 470 nm with a photoluminescence quantum yield up to 60% was obtained by mixing the two ligands due to the formation of a narrower quantum-well width distribution. Based on such films, efficient blue PeLEDs with a maximum external quantum efficiency of 8.8% were achieved at 473 nm. Furthermore, we illustrate that the use of dual-ligand with respective tendency of forming small-n and large-n domains is a versatile strategy to achieve narrow quantum-well width distribution for photoluminescence enhancement. Designing efficient blue perovskite LEDs by using mixed halides perovskite is still a challenge, limited mainly by the phase segregation issue. Here, the authors demonstrate in situ fabrication of quasi-2D CsPbClBr2 nanocrystal films with mixed ligands to overcome the constraint. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32789]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Beijing Inst Technol, MIIT Key Lab Low Dimens Quantum Struct & Devices, Sch Mat Sci & Engn, Beijing 100081, Peoples R China 2.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil SSRF, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, CH,Han, DB,Wang, JH,et al. Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes[J]. NATURE COMMUNICATIONS,2020,11(1):-. |
| APA | Wang, CH.,Han, DB.,Wang, JH.,Yang, YG.,Liu, XY.,...&Zhong, HZ.(2020).Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes.NATURE COMMUNICATIONS,11(1),-. |
| MLA | Wang, CH,et al."Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes".NATURE COMMUNICATIONS 11.1(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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