Photovoltaic efficiency of solution-processable organic molecules reached near 10 ％

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2015,（2）
• 页码范围: 191
• 页数: 1页
• 语种: 中文
• DOI: 10.1007/s11426-014-5311-8

摘要

In the family of organic solar cells with the donor materials of organic molecules (vacuum-deposited or solutionprocessed) and conjugated polymers,solution-processable organic molecules possess the advantages of solutionprocessibility in comparison with the vacuum-evaporated unsoluble organic molecules and definite molecular weight and high purity in comparison with the conjugated polymers.But in early stage of the studies,the researchers pay too more attention to the solubility of the molecules and focused on the molecules based on non-planar triphenylamine (TPA) unit and the molecules based on hyperbranched thiophene oligomers for their good solubility.The non-planar structure of the molecules results in poorer absorption and lower hole mobility,leading to lower photovoltaic efficiency.While the photovoltaic efficiency of conjugated polymers has gained steady progress by designing new polymers with D-A structure,planar structure and side chain engineering (conjugated side chains and electron-withdrawing side chains) and by device optimization.