Random Terpolymer Designed with Tunable Fluorescence Lifetime for Efficient Organic/Inorganic Hybrid Solar Cells

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• 作者：Qinghua Li ; Xiao Jin ; Yinglin Song ; Qin Zhang ; Zhongyuan Xu ; Zihan Chen ; Yuanyuan Cheng ; Xubiao Luo
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 12, 2015
• 年：2015
• 卷：7
• 期：31
• 页码：17408-17415
• 全文大小：423K
• ISSN：1944-8252

文摘

The long photoluminescence lifetime of the organic semiconductor materials is of great importance in assuring the photoexcited extion to have enough time to achieve successful separation at the interface and improving the performances of organic/inorganic hybrid solar cells. Unfortunately, many efforts have been devoted to the bandgap or molecular energy level control, whereas this viewpoint is rarely referred. Herein, we prepare a random D鈥揂 terpolymers based on PZT and BDT cores in conjugation with electron withdrawing BT unit and explore their applications in HSCs. Except for the energy level and the bandgap, the role that monomers ratio plays in photoluminescence lifetime is particularly involved. As a result, the average PL lifetimes of the terpolymer are significantly tuned. The optimized terpolymer exhibits a longer PL lifetime and prominent charge transfer ability, thus leading to a notable enhancement of PCE when compared with its counterparts, although their bandgaps and molecular energy levels are almost the same.