Original Article
  • Optical Properties and Stability of PMMA/perovskite Composites

  • Gi Hun Nam*, Minjin Kim*, Sang Hyun Lee*†

  • * The School of Chemical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea

  • PMMA/페로브스카이트 복합체의 광학적 특성 및 안정성

  • 남기훈* · 김민진* · 이상현*†

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this study, CsPbBr3 quantum dots synthesized via a hot-injection method were incorporated into polymethyl methacrylate (PMMA) matrices with different molecular weights and concentrations to form composites thin films by spin coating. The stability of these composites was evaluated under ultraviolet (UV) irradiation and thermal stress. It was found that low-molecular-weight PMMA most effectively mitigated UV-induced red shift and photoluminescence (PL) quenching. In contrast, composites with high-molecular-weight PMMA retained 73% of their initial PL intensity after thermal treatment, indicating superior thermal stability. These finding highlight the critical role of molecular weight and content of PMMA on the optical stability of CsPbBr3 quantum dots and provide strategic insights for polymer encapsulation approaches to enhance the environmental durability of perovskite-based optoelectronic devices including display and sensors.


본 연구에서는 고온 주입법으로 합성한 CsPbBr3 양자점과 서로 다른 분자량 및 함량의 PMMA와 복합화한 후, 이를 스핀 코팅하여 박막을 제작하고 자외선 및 열 조건에서의 안정성을 평가하였다. 자외선 조사 실험에서는 저분자량 PMMA가 광발광 세기 감소와 적색 편이를 가장 효과적으로 억제하였다. 반면, 열처리 후에는 고분자량 PMMA 복합체가 PL 세기 73%를 유지해 열화를 최적으로 방지했다. 본 결과는 PMMA 분자량과 함량이 CsPbBr3 양자점의 자외선과 열 안정성에 미치는 영향을 규명하였으며, 디스플레이 및 센서 등 광전자소자의 응용을 위한 CsPbBr3 안정성 향상을 위한 고분자 캡슐화 전략에 유용한 방향성을 제시한다.


Keywords: 페로브스카이트(Perovskite), 고분자(Polymer), 복합체(Composites), 광발광(Photoluminescence), 안정성(Stability)

This Article

Correspondence to

  • Sang Hyun Lee

  • The School of Chemical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea

  • E-mail: leeshyun@jnu.ac.kr