题目：

Highly Efficient Hybrid Perovskite/Organic Tandem White Light-Emitting Diodes with External Quantum Efficiency Exceeding 20%

作者：

Shuang-Qiao Sun^1#, Yating Cai^4#, Min Zhu^1#, Wei He¹, Bo-Chen Liu¹, Yan-Lin Xu¹, Xuan Lv¹, Qi Sun¹, Pengyi Liu⁴, Tingting Shi⁴*, Yue-Min Xie^1,3*, & Man-Keung Fung^1,2*

单位：

¹Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University

²Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Zhuhai MUST Science and Technology Research Institute, Macau University of Science and Technology, Taipa 999078, Macau, China

³Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, PR China

⁴Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Department of Physics，Jinan University, Guangzhou, Guangdong 510632, P. R. China

摘要：

Perovskite light-emitting diodes (PeLEDs) have shown great potential for low-cost display and lighting technologies, and all-inorganic blue PeLEDs are recognized as a promising substitute for blue fluorescent/phosphorescent organic light-emitting diodes (OLEDs) owing to their superior color purity and great stability potential. However, confined by the solution fabrication process, depositing multi-layered white PeLEDs remains a challenge. Here, a newly designed hybrid perovskite/organic tandem white LED (POTWLED), integrated with a bottom blue PeLED unit and a top orange/(orange + red) OLED unit, to prevent damage to the underlying perovskite layer caused by the deposition of the top emitting layers, is reported. To optimize the performance of POTWLEDs, a conductive passivator of 2,8-bis(diphenylphosphoryl)dibenzo[b,d] thiophene, with a strong surface binding group of P═O, is introduced to passivate perovskite defects, which promotes a maximum external quantum efficiency (EQE) of 17.3% for blue PeLEDs with an emission peak at 488 nm. As a result, based on the optimized blue PeLED units, a maximum EQE of 23.9% with a low color temperature of 2522 K is obtained for POTWLEDs, which is the highest efficiency for perovskite-based WLEDs, illustrating the great potential of the hybrid tandem device in fabricating high-performance perovskite-based WLEDs.

影响因子：

19.924

分区情况：

一区

链接：

https://doi.org/10.1002/adfm.202306549