Solution-processed perovskite light emitting diodes with efficiency exceeding 15% through additive-controlled nanostructure tailoring.
Solution-processed perovskite light emitting diodes with efficiency exceeding 15% through additive-controlled nanostructure tailoring.
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溶液处理%20钙钛矿%20光%20发射%20二极管%20与%20效率%20超越%2015%%20通过%20添加剂控制%20纳米结构%20剪裁
DOI：
10.1038/s41467-018-06425-5
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发表时间：
2018-09-24
影响因子：
16.6
通讯作者：
Sun B
中科院分区：
文献类型：
--
作者：
Ban M;Zou Y;Rivett JPH;Yang Y;Thomas TH;Tan Y;Song T;Gao X;Credgington D;Deschler F;Sirringhaus H;Sun B
有机金属卤化物钙钛矿（OHP）是一种很有前途的低成本、高效率发光二极管材料。在具有二维OHP纳米片和小的三维纳米晶体的分布的膜中，可以实现能量漏斗，其将激发集中在高效的辐射复合中心。然而，这种能量漏斗可能包含低效的途径，如纳米晶体的尺寸分布，OHP和有机相之间的相分离。在这里，我们证明了OHP微晶分布和相分离可以通过添加抑制有机相结晶的分子来精确控制。我们使用这些改进的材料特性来实现具有15.5%的外部量子效率的OHP发光二极管。我们的研究结果表明，通过添加明智地选择的分子添加剂，充分的载流子限制与一阶复合特性，并有效抑制非辐射复合，可以实现，同时保持有效的电荷传输特性。
Organometal halide perovskites (OHP) are promising materials for low-cost, high-efficiency light-emitting diodes. In films with a distribution of two-dimensional OHP nanosheets and small three-dimensional nanocrystals, an energy funnel can be realized that concentrates the excitations in highly efficient radiative recombination centers. However, this energy funnel is likely to contain inefficient pathways as the size distribution of nanocrystals, the phase separation between the OHP and the organic phase. Here, we demonstrate that the OHP crystallite distribution and phase separation can be precisely controlled by adding a molecule that suppresses crystallization of the organic phase. We use these improved material properties to achieve OHP light-emitting diodes with an external quantum efficiency of 15.5%. Our results demonstrate that through the addition of judiciously selected molecular additives, sufficient carrier confinement with first-order recombination characteristics, and efficient suppression of non-radiative recombination can be achieved while retaining efficient charge transport characteristics.
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影响因子：
16.6
作者：
Zhang L;Yang X;Jiang Q;Wang P;Yin Z;Zhang X;Tan H;Yang YM;Wei M;Sutherland BR;Sargent EH;You J
通讯作者：
You J
超越卤化铅钙钛矿中缓慢的双分子重组，实现电致发光
影响因子：
16.6
作者：
Xing G;Wu B;Wu X;Li M;Du B;Wei Q;Guo J;Yeow EK;Sum TC;Huang W
通讯作者：
Huang W
影响因子：
10.8
作者：
Protesescu L;Yakunin S;Bodnarchuk MI;Krieg F;Caputo R;Hendon CH;Yang RX;Walsh A;Kovalenko MV
通讯作者：
Kovalenko MV
影响因子：
16.6
作者：
Richter, Johannes M.;Abdi-Jalebi, Mojtaba;Friend, Richard H.
通讯作者：
Friend, Richard H.
影响因子：
3.7
作者：
KUMAGAI, M;TAKAGAHARA, T
通讯作者：
TAKAGAHARA, T