Much attention has been paid to the push-pullstructure organic small molecule(OSM) materials for photovoltaic(PV) application in the past decade, due to their facile reduction of energy band gap(Eg) and effective cont...Much attention has been paid to the push-pullstructure organic small molecule(OSM) materials for photovoltaic(PV) application in the past decade, due to their facile reduction of energy band gap(Eg) and effective control of PV properties. π-bridge plays an important role in the push-pull-structure OSMs since an appropriate π-linkage is crucial for improving the PV performance of organic solar cells(OSCs). In this review, various π-bridge groups(thiophene, alkene, alkyne, arene and heterocycle) and the pertinent π-linkage effect will be systematically summarized.These results suggest that the in-depth study of the π-linkage effect is essential to deeply understanding the relationship between the molecular structure and property, thus improving PV performance.展开更多
基金funded by the National Natural Science Foundation of China(21102013)the Fundamental Research Funds for the Central Universities(DUT16ZD205)
文摘Much attention has been paid to the push-pullstructure organic small molecule(OSM) materials for photovoltaic(PV) application in the past decade, due to their facile reduction of energy band gap(Eg) and effective control of PV properties. π-bridge plays an important role in the push-pull-structure OSMs since an appropriate π-linkage is crucial for improving the PV performance of organic solar cells(OSCs). In this review, various π-bridge groups(thiophene, alkene, alkyne, arene and heterocycle) and the pertinent π-linkage effect will be systematically summarized.These results suggest that the in-depth study of the π-linkage effect is essential to deeply understanding the relationship between the molecular structure and property, thus improving PV performance.
