Effect of the hole transport layer on the performance of sky-blue Dion-Jacobson perovskite light-emitting diodes

Sun, Wen Ting1; He, Yanling1; Ali, Muhammad Umair1; Liu, Qiye2,3; Mo, Hongbo1; Wang, Sijia4; Ng, Alan Man Ching5; Djurisic, Aleksandra B.1

2023-09-01

10.1039/d3tc02546

JOURNAL OF MATERIALS CHEMISTRY C   Impact Factor & Quartile

2050-7526

2050-7534

["We investigated the performance of sky-blue quasi-2D Dion-Jacobson perovskite light-emitting diodes as a function of perovskite composition and device architecture. Perovskite composition optimization is needed in order to optimize the film structure to achieve a compromise between efficient funneling and a consequent red shift of the emission, achieving emission in the blue spectral range. Composition optimization was achieved by adjusting the ratio of spacer cations methylenediammonium (MDA) and decanediammonium (DDA) and 3D perovskite CsPbBr3, to achieve films with optimal composition for sky-blue emission. In addition to the perovskite composition, the choice of the hole transport layer (HTL) had a significant effect on device efficiency. Significant enhancement in the efficiency from 1.8% (control device with a self-assembled monolayer HTL) to 4.1% (optimized HTL structure) is achieved by inserting diphenyl-4-triphenylsilylphenyl phosphine oxide (TSPO1) between the HTL layers and the perovskite. This results in an improved balance of electron and hole injection, as well as passivation of defects in the perovskite, which is responsible for the observed improvements in device performance.","Increased efficiency of sky-blue LEDs based on Dion-Jacobson perovskite emitters is achieved through the optimization of the hole transport layer-perovskite interface."]

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This work was supported by the NSFC project 6207032617 and RGC GRF project 17301520, RGC CRF project 7035-20G, as well as the Seed Funding for Basic Research and Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong.[6207032617] ; NSFC[17301520] ; RGC GRF project[7035-20G]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:001074642300001

ROYAL SOC CHEMISTRY

Web of Science

1.Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Univ Hong Kong, Dept Mech Engn, Pokfulam Rd, Hong Kong, Peoples R China
5.Southern Univ Sci & Technol, Core Res Facil, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China

Sun, Wen Ting,He, Yanling,Ali, Muhammad Umair,et al. Effect of the hole transport layer on the performance of sky-blue Dion-Jacobson perovskite light-emitting diodes[J]. JOURNAL OF MATERIALS CHEMISTRY C,2023.

Sun, Wen Ting.,He, Yanling.,Ali, Muhammad Umair.,Liu, Qiye.,Mo, Hongbo.,...&Djurisic, Aleksandra B..(2023).Effect of the hole transport layer on the performance of sky-blue Dion-Jacobson perovskite light-emitting diodes.JOURNAL OF MATERIALS CHEMISTRY C.

Sun, Wen Ting,et al."Effect of the hole transport layer on the performance of sky-blue Dion-Jacobson perovskite light-emitting diodes".JOURNAL OF MATERIALS CHEMISTRY C (2023).