| Autor: |
Chang Min Lee, Dong Hyun Choi, Amjad Islam, Dong Hyun Kim, Tae Wook Kim, Geon-Woo Jeong, Hyun Woo Cho, Min Jae Park, Syed Hamad Ullah Shah, Hyung Ju Chae, Kyoung-Ho Kim, Muhammad Sujak, Jae Woo Lee, Donghyun Kim, Chul Hoon Kim, Hyun Jae Lee, Tae-Sung Bae, Seung Min Yu, Jong Sung Jin, Yong-Cheol Kang, Juyun Park, Myungkwan Song, Chang-Su Kim, Sung Tae Shin, Seung Yoon Ryu |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Scientific Reports, Vol 12, Iss 1, Pp 1-14 (2022) |
| ISSN: |
2045-2322 |
| Popis: |
Herein, an unprecedented report is presented on the incorporation of size-dependent gold nanoparticles (AuNPs) with polyvinylpyrrolidone (PVP) capping into a conventional hole transport layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The hole transport layer blocks ion-diffusion/migration in methylammonium-lead-bromide (MAPbBr3)-based perovskite light-emitting diodes (PeLEDs) as a modified interlayer. The PVP-capped 90 nm AuNP device exhibited a seven-fold increase in efficiency (1.5%) as compared to the device without AuNPs (0.22%), where the device lifetime was also improved by 17-fold. This advancement is ascribed to the far-field scattering of AuNPs, modified work function and carrier trapping/detrapping. The improvement in device lifetime is attributed to PVP-capping of AuNPs which prevents indium diffusion into the perovskite layer and surface ion migration into PEDOT:PSS through the formation of induced electric dipole. The results also indicate that using large AuNPs (> 90 nm) reduces exciton recombination because of the trapping of excess charge carriers due to the large surface area. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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