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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국진공학회(ASCT) Applied Science and Convergence Technology Applied Science and Convergence Technology Vol.33 No.5
- 발행연도
- 2024.9
- 수록면
- 140 - 143 (4page)
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Perovskite nanocrystals (NCs) have attracted significant attention owing to their unique properties such as high photoluminescence (PL) quantum yield and color tunability. They can be easily synthesized at room temperature via ligand-assisted reprecipitation (LARP). The bandgap energy of the NCs could be tuned by controlling the growth conditions of the LARP method. Therefore, we synthesized the CsPbBr₃ perovskite NCs with the precursor dissolution time sequentially increased (10, 15, 20, and 25 min) so as to increase the precursor concentration in the solution. The PL spectra showed that the PL peak positions of the samples shifted from 509.5 to 518.0 nm with increasing dissolution time owing to the decreased ligand-to-precursor ratio. The full-width at half-maximum and Stokes shift decreased with increasing dissolution time because of size-defocusing and the confined hole states near the valance band, respectively. In addition, the bandgap and size estimations were investigated using the Tauc plot and effective mass approximation. With increasing the dissolution time, the estimated bandgap of the NCs varied from 2.41 to 2.37 eV, while the calculated size increased from 5.7 to 6.6 nm.
목차
ABSTRACT
1. Introduction
2. Experimental details
3. Results and discussion
4. Conclusions
References
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