التفاصيل البيبلوغرافية
| العنوان: |
Photovoltaic Devices Prepared through a Trihydroxy Substitution Strategy on an Unsymmetrical Squaraine Dye. |
| المؤلفون: |
Wu, Jianglin, Chen, Yao, Yang, Lin, Hu, Bin, Lu, Zhiyun, Huang, Yan, Si, Changfeng, Chen, Guo |
| المصدر: |
Chemistry - A European Journal; 3/2/2018, Vol. 24 Issue 13, p3234-3240, 7p |
| مصطلحات موضوعية: |
SQUARAINES, PHOTOVOLTAIC power generation, ANISOLE, COLUMN chromatography, DENSITY functional theory |
| مستخلص: |
Abstract: A series of unsymmetrical arene‐1,3‐squaraine (USQ) derivatives with two, three, or four hydroxy (−OH) substituents, namely, USQ‐2‐OH, USQ‐3‐OH, or USQ‐4‐OH, respectively, were designed and synthesized, and the effect of the number of hydroxy groups on the optoelectronic properties of USQs were investigated. Despite the three compounds having similar UV/Vis absorption and HOMO energy levels, solution‐processed bulk‐heterojunction (BHJ) small‐molecule organic solar cells with USQ‐3‐OH as electron‐donor materials exhibit the highest power conversion efficiency of 6.07 %, which could be mainly attributed to the higher hole mobility and smaller phase separation. It is also noteworthy that the short‐circuit current (Jsc) of the USQ‐3‐OH‐based device is as high as 14.95 mA cm−2, which is the highest Jsc values reported for squaraine‐based BHJ solar cells to date. The results also indicate that more −OH substituents on squaraine dyes do not necessarily lead to better photovoltaic performance. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
