Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability
文献类型：期刊论文
| 作者 | Cheng, Guoqing1,2,4; Liu, Yan1,2; Chen, Tao1,2,4; Chen, Wenjing1,2; Fang, Zhibin1,2; Zhang, Ji1,2; Ding, Liming3; Li, Xinhua4; Shi, Tongfei4 ; Xiao, Zhengguo1,2
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| 刊名 | ACS APPLIED MATERIALS & INTERFACES
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| 出版日期 | 2020-04-15 |
| 卷号 | 12 |
| ISSN号 | 1944-8244 |
| 关键词 | inorganic perovskite light-emitting diodes nanocrystal external quantum efficiency operation stability |
| DOI | 10.1021/acsami.9b23170 |
| 通讯作者 | Shi, Tongfei(tfshi@issp.ac.cn) ; Xiao, Zhengguo(zhengguo@ustc.edu.cn) |
| 英文摘要 | Stability is becoming a main issue for perovskite light-emitting diodes (PeLEDs), as their external quantum efficiency (EQE) has been boosted to above 20%. An all-inorganic perovskite, cesium lead iodide (CsPbI3), has better stability than organic-inorganic hybrid perovskites but suffers from a transition to yellow delta-CsPbI3 phase at room temperature. Herein, we report stabilization of the alpha-CsPbI3 phase by in situ formation of perovskite nanocrystals (NCs). By incorporation of a proper ratio of bulky organoammonium halides, 4-fluoro-phenylmethylammonium iodide (4-F-PMAI), stable alpha-CsPbI3 films with nanometer-sized crystals can be obtained using a one-step spin-coating approach. The PeLEDs using alpha-CsPbI3 NC films as emitters show a pure red emission at 692 nm and a high EQE of 14.8%. The EQE is further boosted to 18.6% using CsPbI2.8Br0.2 as the emissive layer. Furthermore, the PeLEDs show a very decent half-lifetime of over 1200 min and a shelf stability of over 2 months, much longer than that of hybrid PeLEDs. |
| WOS关键词 | CESIUM LEAD IODIDE ; HALIDE PEROVSKITES ; PHASE ; STABILIZATION ; ALPHA-CSPBI3 |
| 资助项目 | National Natural Science Foundation of China[51872274] ; National Natural Science Foundation of China[51472247] ; National Natural Science Foundation of China[U1632123] ; Fundamental Research Funds for the Central Universities[WK2060190053] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000526330900097 |
| 资助机构 | National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/103701]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Shi, Tongfei; Xiao, Zhengguo |
| 作者单位 | 1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, Dept Phys, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Key Lab Nanosyst & Hierarch Fabricat, Natl Ctr Nanosci & Technol, Ctr Excellence Nanosci, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Guoqing,Liu, Yan,Chen, Tao,et al. Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12. |
| APA | Cheng, Guoqing.,Liu, Yan.,Chen, Tao.,Chen, Wenjing.,Fang, Zhibin.,...&Xiao, Zhengguo.(2020).Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability.ACS APPLIED MATERIALS & INTERFACES,12. |
| MLA | Cheng, Guoqing,et al."Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability".ACS APPLIED MATERIALS & INTERFACES 12(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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