Park, Shulgi Cho, Junhee Jeong, Dawoon Jo, Jiyeon Nam, Minwoo Rhee, Hanju Han, Joon Soo Cho, Yong Jae Ju, Byeong-Kwon Ko, Doo-Hyun Jang, Ho Seong 2024-01-19T17:01:15Z 2024-01-19T17:01:15Z 2021-09-05 2020-08-01 1385-8947 https://pubs.kist.re.kr/handle/201004/118270 In this paper, we report the creation of robust and bright visible light-emitting perhydropolysilazane (PHPS)-derived nanopatterned CsPbBr3 perovskite nanocrystal (PNC)-SiO2 films. The CsPbBr3-SiO2 films exhibit improved stability against heat exhibiting 35.4% of the initial photoluminescence (PL) intensity after 160 degrees C heat-treatment and improved stability against water showing 92.6% of the initial PL intensity even after 30 days' water immersion. In addition, the introduction of nanocylinder and nanocone patterns to the PHPS-derived CsPbBr3-SiO2 film resulted in 3.71 and 4.62-fold PL enhancement compared with the planar counterpart. The time resolved PL analysis and finite-difference time domain calculations indicate that the improvement of optical performance of the nanopatterned CsPbBr3-SiO2 films could be attributed to the enhanced absorption and emission via Mie resonance excitation. When the nanopatterned CsPbBr3-SiO2 film was combined with a blue light-emitting diode (LED), some of the blue light from the LED was converted into green light with high light conversion efficiency (72.3%). Along with the improved stability, the enhanced luminescence of the nanopatterned CsPbBr3-SiO2 films further extends their applicability for use in display devices with wide color gamut. English ELSEVIER SCIENCE SA LIGHT-EMITTING-DIODES SILICA THIN-FILMS ROOM-TEMPERATURE QUANTUM DOTS EMISSION CSPBX3 Simultaneous enhancement of luminescence and stability of CsPbBr3 perovskite nanocrystals via formation of perhydropolysilazane-derived nanopatterned film Article 10.1016/j.cej.2020.124767 1 CHEMICAL ENGINEERING JOURNAL, v.393 CHEMICAL ENGINEERING JOURNAL 393 scie scopus 000543713600064 2-s2.0-85082118064 Engineering, Environmental Engineering, Chemical Engineering Article LIGHT-EMITTING-DIODES SILICA THIN-FILMS ROOM-TEMPERATURE QUANTUM DOTS EMISSION CSPBX3 Perovskite nanocrystals Perhydropolysilazane Nanopattern Perovskite nanocrystal film