Hadmojo Wisnu Tantyo, Yim Dajeong, Aqoma Havid, Ryu Du Yeol, Shin Tae Joo, Kim Hyun Woo, Hwang Eojin, Jang Woo-Dong, Jung In Hwan, Jang Sung-Yeon
Department of Chemistry , Kookmin University , 77 Jeongneung-ro, Seongbuk-gu , Seoul 02707 , Republic of Korea . Email:
Department of Chemistry , Yonsei University , 50 Yonsei-ro, Seodaemun-gu , Seoul , Republic of Korea . Email:
Chem Sci. 2017 Jul 1;8(7):5095-5100. doi: 10.1039/c7sc01275f. Epub 2017 May 16.
A near-infrared-harvesting n-type porphyrin-based acceptor for organic photovoltaics (OPVs) was developed. The n-type acceptor, PDI-P-PDI, was designed by connecting a zinc porphyrin (P) core to two perylenediimide (PDI) wings through ethyne bridges. A narrow bandgap of 1.27 eV was achieved through the extended π-conjugation and intramolecular charge transfer between the strongly electron-donating P core and the electron-accepting PDI wings. A bulk heterojunction (BHJ) structured photovoltaic device fabricated from PDI-P-PDI with PTB7-Th exhibited panchromatic photon-to-current conversion from 350 to 900 nm. A power conversion efficiency of 5.25% with a remarkably low of 0.54 eV was achieved by optimizing the nanomorphology of the BHJ films by adding pyridine and by controlling the ZnO/BHJ interfacial properties.
开发了一种用于有机光伏（OPV）的近红外光捕获n型卟啉基受体。n型受体PDI-P-PDI是通过乙炔桥将锌卟啉（P）核连接到两个苝二酰亚胺（PDI）翼而设计的。通过扩展的π共轭以及强供电子P核与吸电子PDI翼之间的分子内电荷转移，实现了1.27 eV的窄带隙。由PDI-P-PDI与PTB7-Th制成的体异质结（BHJ）结构光伏器件在350至900 nm范围内表现出全色光子到电流的转换。通过添加吡啶优化BHJ薄膜的纳米形貌并控制ZnO/BHJ界面性质，实现了5.25%的功率转换效率以及低至0.54 eV的显著开路电压损失。
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