Incorporating CsPbBr3 Nanocrystals into Porous AlO(OH) Matrices to Improve their Stability in Backlit Displays

Jiangcong Zhou; Yiqing Lai; Na Lin; Xiaotian Huang; Yu Chen; Yao Yao; Bo Wang

추천

검색

자료유형: 학술저널

저자정보: Jiangcong Zhou (Longyan University) Yiqing Lai (Fuzhou University) Na Lin (Longyan University) Xiaotian Huang (Longyan University) Yu Chen (Longyan University) Yao Yao (Longyan University) Bo Wang (Wuyi University)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.14 No.12

발행연도: 2019.1

수록면: 150 - 159 (10page)

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

Currently, the poor stability of inorganic perovskite CsPbX3 (X = Cl, Br, I) nanocrystals restricts their practical application in optoelectronic devices. Therefore, improving the stability of this material remains an urgent task for most researchers. In this study, incorporation of CsPbBr3 nanocrystals into porous AlO(OH) matrices through simple in situ synthesis was demonstrated to be an efficient approach for improving the nanocrystal stability. X-ray diffraction (XRD) revealed that the as-obtained product was composed of cubic CsPbBr3 nanocrystals and orthorhombic AlO(OH) compounds. In addition, transmission electron microscopy (TEM) revealed that the CsPbBr3 nanocrystals were successfully encapsulated by AlO(OH) matrices. The Brunauer–Emmett–Teller (BET) specific surface area was 234.96 m2 g -1 for AlO(OH) and 60.08 m2 g -1 for the CsPbBr3@AlO(OH) composites. The decrease in surface area could be attributed to the filling of the AlO(OH) pores by the CsPbBr3 nanocrystals. Further, the as-prepared composites showed red-shifted emission at 522 nm and a larger full width at half-maximum (FWHM) as 26 nm, compared with those of the CsPbBr3 nanocrystals with the emission at 517 nm and FWHM as 17 nm. More importantly, the emission intensity preserved 67% of the original value after a storage time of 120 h, but bare CsPbBr3 nanocrystals rapidly degraded within only 1 h in the polar ethanol solution. Finally, a light-emitting diode (LED) device was fabricated by coating the CsPbBr3@AlO(OH) composites and red commercial K2SiF6:Mn4+ phosphors on the surface of a blue InGaN chip, covering 96% of National Television Standards Committee. The results indicate that the obtained composites could be promising luminescent materials for backlit displays.

#Halide perovskite nanocrystals #improved stability #compositions #porous matrices #optoelectronic material #backlit display

참고문헌 (30)

참고문헌 신청

J. Song / 2015 / Adv. Mater 27:7162

Q. A. Akkerman / 2015 / J. Am. Chem. Soc 137:10276

X. Zhang / 2016 / Adv. Funct. Mater 26:4595

G. Li / 2016 / Adv. Funct. Mater 26:8478

Y. Wei / 2019 / Chem. Soc. Rev 48:310

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!