Home
학과소개
주임교수 인사말 학과소개 연혁 비전 및 진로 학과를 위한 기부 PCE 어울림 소식지 홍보자료 찾아오시는길
사람들
교수진 직원
연구
RESEARCH OUTCOME 연구분야 보유연구장비 연구소&연구센터 연구관련정보센터
학부/대학원
학부 대학원
  • 4단계 BK21 사업
    • 학생활동
    화공과 궁금하니? PCE졸업생 인터뷰 우리들의 활동 PCE 스튜디오 너화아
    알림마당
    공지사항 정기세미나 새소식 학사일정 취업정보
    자료실
    강의실이용안내 각종서식 갤러리
    닫기

    연구

    Research Outcome

    미래를 창조하는 포스텍 화학공학과

    Gradated Mixed Hole Transport Layer in Perovskite Solar Cell: Improving Moisture Stability and Efficiency

    Title of paper
    Gradated Mixed Hole Transport Layer in Perovskite Solar Cell: Improving Moisture Stability and Efficiency
    Author
    [박태호교수 연구실]
    Publication in journal
    ACS Applied Matererial and Interfaces 2017, 9 (33), 27720–27726
    Publication date
    20170801
     
    [abstract]
    We demonstrate a simple and facile way to improve the efficiency and moisture stability of perovskite solar cells using commercially available hole transport materials, 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (spiro-OMeTAD) and poly(3-hexylthiophene) (P3HT). The hole transport layer (HTL) composed of mixed spiro-OMeTAD and P3HT exhibited favorable vertical phase separation. The hydrophobic P3HT was more distributed near the surface (the air atmosphere), whereas the hydrophilic spiro-OMeTAD was more distributed near the perovskite layer. This vertical separation resulted in improved moisture stability by effectively blocking moisture in air. In addition, the optimized composition of spiro-OMeTAD and P3HT improved the efficiency of the solar cells by enabling fast intramolecular charge transport. In addition, a suitable energy level alignment facilitated charge transfer. A device fabricated using the mixed HTL exhibited enhanced performance, demonstrating 18.9% power conversion efficiency and improved moisture stability.
     
    DOI: 10.1021/acsami.7b07071