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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국진공학회(ASCT) Applied Science and Convergence Technology Applied Science and Convergence Technology Vol.30 No.5
- 발행연도
- 2021.9
- 수록면
- 152 - 155 (4page)
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We have studied the optical and structural properties of CsPbBr₃ perovskite nanocrystals (NCs) fabricated with various reaction times. The temporal evolution of the ensemble optical properties, such as absorption and fluorescence (FL) spectra and photoluminescence quantum yield (PLQY), was recorded under a set reaction temperature (170 ℃) and various amounts of time (5 s – 60 min). The FL intensity of the CsPbBr₃ NCs gradually decreased with increasing reaction time, and the observed PLQY of the CsPbBr₃ NCs ranged from less than 20% up to 35% because of the enlarged crystal size and the induced charge trap states. The FL peaks of as-obtained CsPbBr₃ NCs were tuned in the range of 516.8 to 526.8 nm with increasing reaction time as a result of the ripening phenomenon. Transmission electron microscopy and selected area electron diffraction analysis were performed to analyze the structural properties. The results revealed that the average edge length of CsPbBr₃ NCs with a reaction time of 5 s was 13.4 nm and confirmed that the cubic crystal structure was well ordered.
목차
ABSTRACT
1. Introduction
2. Experimental details
3. Results and discussion
4. Conclusions
References
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