Enhancing stability of red perovskite nanocrystals through copper substitution for efficient light-emitting diodes
Enhancing stability of red perovskite nanocrystals through copper substitution for efficient light-emitting diodes
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通过铜替代高效发光二极管提高红色钙钛矿纳米晶体的稳定性
DOI:
10.1016/j.nanoen.2019.05.027
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发表时间:
2019-08
期刊:
影响因子:
17.6
通讯作者:
Tu Guoli
中科院分区:
文献类型:
--
作者:
Zhang Jibin;Zhang Louwen;Cai Ping;Xue Xiaogang;Wang Mingkui;Zhang Jian;Tu Guoli
Red perovskite nanocrystals (NCs) are important for efficient perovskite light-emitting diodes (PeLEDs). However, the implementation of these red perovskite NCs are hindered because of their low structural stability. In the present work, highly stable and luminescent red perovskite CsPbBrI2NCs were achieved through copper substitution and halide rich passivation strategy. Because the ion radius of Cu2+(0.72 Å) is smaller than that of Pb2+(1.19 Å), divalent Cu2+cations can partly replace the Pb2+ions in the lattice structure of CsPbBrI2NCs. We demonstrated that the incorporation of Cu2+ions can enhance formation energy, cause a slight lattice contraction, and hence stabilize the cubic phase of these NCs. On the other hand, Cu2+-substituted CsPbBrI2NCs with higher luminescence were synthesized in a halide-rich passivation method. Benefiting from such an effective substitution and halide-rich strategy, these Cu2+-substituted CsPbBrI2NCs has shown excellent performance with photoluminescence quantum yield (PL QY) (up to 94.8%) and an improved stability. The highly stable and luminescent Cu2+-substituted CsPbBrI2NCs can function well as efficient light emitters toward the fabrication of high-performance red perovskite LEDs.
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影响因子:
15
作者:
Yao Ji-Song;Ge Jing;Han Bo-Ning;Wang Kun-Hua;Yao Hong-Bin;Yu Hao-Lei;Li Jian-Hai;Zhu Bai-Sheng;Song Ji-Zhong;Chen Chen;Zhang Qun 张群;Zeng Hai-Bo;Luo Yi;Yu Shu-Hong
通讯作者:
Yu Shu-Hong
影响因子:
9.9
作者:
Zhang, Jibin;Fan, Lianwei;Tu, Guoli
通讯作者:
Tu, Guoli
影响因子:
15
作者:
Yong, Zi-Jun;Guo, Shao-Qang;Sun, Hong-Tao
通讯作者:
Sun, Hong-Tao
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
R. Zhu;Z. Luo;Haiwei Chen;Yajie Dong;Shin-Tson Wu;K Masaoka;Y. Nishida;M. Sugawara;E. Nakasu-E
通讯作者:
R. Zhu;Z. Luo;Haiwei Chen;Yajie Dong;Shin-Tson Wu;K Masaoka;Y. Nishida;M. Sugawara;E. Nakasu-E
影响因子:
29.4
作者:
Cho, Himchan;Kim, Young-Hoon;Lee, Tae-Woo
通讯作者:
Lee, Tae-Woo