Project supported by the National Natural Science Foundation of China (Grant Nos. 60978060, 10804006, and 10974013);the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20090009110027);the Research Fund for the Youth Scholars of the Doctoral Program of Higher Education, China (Grant No. 20070004031);the Beijing Municipal Natural Science Foundation of China (Grant No. 1102028);the Beijing Municipal Science & Technology Commission of China (Grant No. Z090803044009001);the National Basic Research Program of China (Grant No. 2010CB327705);the International Science and Technology Cooperation Program (Grant No. 2008DFA61420)
In this work, bathocuproine (BCP) and bathophenanthroline (Bphen), commonly used in small-molecule organic solar cells (OSCs), are adopted as the buffer layers to improve the performance of the polymer solar cel...