Dithienobenzodithiophene-Based Small Molecule Organic Solar Cells with over 7% Efficiency via Additive- and Thermal-Annealing-Free Processing
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- 作者：Hyeng Gun Song ; Yu Jin Kim ; Ji Sang Lee ; Yun-Hi KimChan Eon Park ; Soon-Ki Kwon
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：December 21, 2016
- 年：2016
- 卷：8
- 期：50
- 页码：34353-34359
- 全文大小：555K
- ISSN：1944-8252
文摘
Here we introduce a novel small molecule based on dithienobenzodithiophene and rhodanine, DTBDT-Rho, developed to study the effect of the rhodanine substitutuent on small molecule bulk heterojunction (BHJ) solar cells. DTBDT-Rho possesses distinct crystalline characteristics, sufficient solubility in chlorinated solvents, and broad absorption properties. Therefore, solution-processed BHJ photovoltaic cells made with DTBDT-Rho:PC71BM blends showed an extremely high power conversion efficiency (PCE; 7.10%); notably, this PCE value was obtained without the use of additives or thermal treatments. To our knowledge, the PCE over 7% is a significantly powerful value among rhodanine-based small molecule BHJ solar cells without additives or thermal treatments.