摘要
An inexpensive material, i.e., tetranuclear zinc（Ⅱ） complex, （Zn40（A/D）6） [AID = 7-azaindolate], was utilized as a cathode buffer in organic photovoltaic （OPV） devices, leading to the improvement of device performance. Compared to OPV devices based on a conventional cathode buffer of TPBi （1,3,5-tris（2-N-phenylbenzimidazolyl）benzene）, although the freshly prepared devices showed similar performance, when heated to a series of high temperatures under air, the short circuit current and the open circuit voltage of the Zn40（AID）6 devices dropped more slowly, indicating the superiority of using Zn40（AID）6 as a cathode buffer over TPBi in OPV devices.
An inexpensive material,i.e.,tetranuclear zinc(Ⅱ) complex,(Zn4O(AID)6) [AID = 7-azaindolate],was utilized as a cathode buffer in organic photovoltaic(OPV) devices,leading to the improvement of device performance.Compared to OPV devices based on a conventional cathode buffer of TPBi(1,3,5-tris(2-N-phenylbenzimidazolyl)benzene),although the freshly prepared devices showed similar performance,when heated to a series of high temperatures under air,the short circuit current and the open circuit voltage of the Zn4O(AID)6 devices dropped more slowly,indicating the superiority of using Zn4O(AID)6 as a cathode buffer over TPBi in OPV devices.
基金
supported by the National Natural Science Foundation of China(20974046,61077021,61076016)
New Century Excellent Talents funding from Ministry of Education in China(NCET-08-0697)
National Basic Research Program of China(973 Program,2009CB930600)
