Highly efficient organic-inorganic hybrid perovskite quantum dot/nanocrystal light-emitting diodes using graphene electrode and modified PEDOT:PSS
Highly efficient organic-inorganic hybrid perovskite quantum dot/nanocrystal light-emitting diodes using graphene electrode and modified PEDOT:PSS
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使用石墨烯电极和改性PEDOT:PSS的高效有机-无机杂化钙钛矿量子点/纳米晶发光二极管
DOI：
10.1016/j.orgel.2019.05.046
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发表时间：
2019-09
影响因子：
3.2
通讯作者：
Huang Wei
中科院分区：
文献类型：
--
作者：
Zhang Qing;Lu Yao;Liu Ziwei;Yu Hongtao;Duan Yu;Liu Lihui;Chen Shufen;Huang Wei
由于卤化铅钙钛矿具有优异的光电性能，近年来，钙钛矿量子点/纳米晶发光二极管（PQD/NC）得到了迅速发展。然而，使用石墨烯电极的PDQ/NC LED尚未报道，尽管在柔性显示器和照明光源中具有巨大的应用潜力。在此，石墨烯首先用作PQD和NC LED的电极。为了克服石墨烯疏水性引起的薄膜不均匀性，采用二甲基亚砜（DMSO）和Triton X-100共掺杂对聚（3，4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）进行改性，有效地改善了石墨烯表面的润湿性和石墨烯薄膜的质量。更重要的是，DMSO和Triton X-100的协同效应将PEDOT：PSS的形态从卷曲结构改变为纳米纤维导电网络，充分增强了PEDOT：PSS的导电性。采用这种修饰策略，在石墨烯阳极上成功制备了两种具有CH 3 NH3 PbBr 3 PQD和FA（0.8）Cs（0.2）PbBr（3）（FA = CH（NH 2）（2））NC发光层的绿色LED，与未进行PEDOT：PSS修饰的对应物相比，电流效率分别提高了4.4和7.4倍。本工作中的薄膜改性策略和石墨烯基PQD/NC LED有望为进一步设计和制造柔性高效PQD/NC显示和照明器件提供指导。
Perovskite quantum dot (PQD)/nanocrystal (NC) light-emitting diodes (LEDs) have rapidly developed in last several years due to excellent optoelectronic properties of lead halide perovskites. However, the PDQ/NC LEDs using graphene electrodes haven't been reported despite of huge potential for applications in flexible displays and lighting sources. Herein, graphene is first used as electrodes of PQD and NC LEDs. To overcome film non-uniformity induced by graphene's hydrophobicity, a modification to poly(3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT: PSS) with dimethyl sulfoxide (DMSO) and Triton X-100 codoping is reported, which effectively improves the wettability of graphene surface and sequent film quality. More importantly, the synergistic effect of DMSO and Triton X-100 alters the PEDOT: PSS morphology from a coiled structure to a nanofibril conductive network, sufficiently enhancing the electrical conductivity of PEDOT:PSS. With this modification strategy, two kinds of green LEDs with CH3NH3PbBr3 PQD and FA(0.8)Cs(0.2)PbBr(3) (FA = CH(NH2)(2)) NC emission layer are successfully fabricated on the graphene anodes, with 4.4 and 7.4 fold enhancements on current efficiency compared to the counterpart without PEDOT: PSS modification, respectively. The film modification strategy and graphene-based PQD/NC LEDs in this work are expected to shed light on further design and manufacture of flexible highly efficient PQDs/NCs display and lighting devices.
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影响因子：
17.1
作者：
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通讯作者：
Peumans, Peter
影响因子：
17.1
作者：
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影响因子：
17.1
作者：
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影响因子：
4.6
作者：
Chen S;Zhang Q;Shang W;Liu L;Yu H;Zhang S;Deng L;Wang M;Wang M;Li X;Mi B;Huang W
通讯作者：
Huang W
影响因子：
29.4
作者：
Yu, Zhibin;Zhang, Qingwu;Pei, Qibing
通讯作者：
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