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Dopant-Free Small-Molecule Hole-Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21.
Wang, Yang; Chen, Wei; Wang, Lei; Tu, Bao; Chen, Tian; Liu, Bin; Yang, Kun; Koh, Chang Woo; Zhang, Xianhe; Sun, Huiliang; Chen, Guocong; Feng, Xiyuan; Woo, Han Young; Djurisic, Aleksandra B; He, Zhubing; Guo, Xugang.
Afiliação
  • Wang Y; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Chen W; Key Laboratory of Functional Polymer Materials and State Key Laboratory of Medicinal Chemical Biology, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
  • Wang L; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Tu B; Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong SAR.
  • Chen T; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Liu B; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Yang K; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Koh CW; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Zhang X; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Sun H; Department of Chemistry, Korea University, Seoul, 02841, South Korea.
  • Chen G; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Feng X; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Woo HY; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • Djurisic AB; Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, 518055, Guangdong, China.
  • He Z; Department of Chemistry, Korea University, Seoul, 02841, South Korea.
  • Guo X; Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong SAR.
Adv Mater ; 31(35): e1902781, 2019 Aug.
Article em En | MEDLINE | ID: mdl-31292989
Hole-transporting materials (HTMs) play a critical role in realizing efficient and stable perovskite solar cells (PVSCs). Considering their capability of enabling PVSCs with good device reproducibility and long-term stability, high-performance dopant-free small-molecule HTMs (SM-HTMs) are greatly desired. However, such dopant-free SM-HTMs are highly elusive, limiting the current record efficiencies of inverted PVSCs to around 19%. Here, two novel donor-acceptor-type SM-HTMs (MPA-BTI and MPA-BTTI) are devised, which synergistically integrate several design principles for high-performance HTMs, and exhibit comparable optoelectronic properties but distinct molecular configuration and film properties. Consequently, the dopant-free MPA-BTTI-based inverted PVSCs achieve a remarkable efficiency of 21.17% with negligible hysteresis and superior thermal stability and long-term stability under illumination, which breaks the long-time standing bottleneck in the development of dopant-free SM-HTMs for highly efficient inverted PVSCs. Such a breakthrough is attributed to the well-aligned energy levels, appropriate hole mobility, and most importantly, the excellent film morphology of the MPA-BTTI. The results underscore the effectiveness of the design tactics, providing a new avenue for developing high-performance dopant-free SM-HTMs in PVSCs.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article