Increased luminescent efficiency of perovskite light emitting diodes based on modified two-step deposition method providing gradient concentration
Source abstract
Abstract
We increased the luminescent efficiency of perovskite light-emitting diodes (PeLEDs) by using a modified two-step deposition method combined with an interdiffusion process without additional solvent engineering or additive molecules. Methylammonium lead bromide (MAPbBr3) polycrystalline films with nanosized grains and low electronic disorder were fabricated by a modified two-step deposition process. The as-fabricated MAPbBr3 films showed gradient concentration characteristics as a result of a gradient distribution of the MABr. Also, the MABr-gradient concentration structure was intensified by the interdiffusion process, showing improved performance of MAPbBr3 PeLEDs with maximum current efficiency CEmax = 0.861 cd A−1 and maximum luminance = 604 cd m−2 with very narrow electroluminescence spectral width. This is the highest CEmax among MAPbBr3-based PeLEDs deposited by the two-step deposition method.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering, Seoul National University 1 , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
BK21 PLUS SNU Materials Division for Educating Creative Global Leaders, Seoul National University 2 , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
Research Institute of Advanced Materials, Seoul National University 3 , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
Advance Nano Research Group, Korea Basic Science Institute (KBSI) 4 , 169-148 Gwahak-ro, Yuseong-gu, Daejeon 34133, South Korea
Institute of Engineering Research, Seoul National University 5 , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
Nano Systems Institute (NSI), Seoul National University 6 , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
Funding
National Research Foundation of Korea
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