Chiang Tsung-Yu, Fan Gang-Lun, Jeng Jun-Yuan, Chen Kuo-Cheng, Chen Peter, Wen Ten-Chin, Guo Tzung-Fang, Wong Ken-Tsung
Department of Chemistry, National Taiwan University , Taipei, Taiwan 106.
Institute of Atomic and Molecular Sciences, Academia Sinica , Taipei, Taiwan 106.
ACS Appl Mater Interfaces. 2015 Nov 11;7(44):24973-81. doi: 10.1021/acsami.5b09012. Epub 2015 Oct 29.
Thermal curing of the styrene-functionalized 9,9-diarylfluorene-based triaryldiamine monomer (VB-DAAF) forms an ideal p-type organic electrode interlayer capable of resisting solvation of the polar precursor solution in fabricating methylammonium lead iodide (CH3NH3PbI3) perovskite/fullerene (C60) planar heterojunction hybrid solar cells. The polymerized VB-DAAF film exhibits a good energy level alignment with the valence-band-edge level of the CH3NH3PbI3 perovskite to facilitate the transport of holes. The large energy barrier to the conduction-band-edge level of the CH3NH3PbI3 perovskite effectively blocks electrons from reaching the positive electrode and reduces the photon energy loss due to recombination. The best-performing cell with the configuration of glass/indium-tin oxide/polymerized VB-DAAF/CH3NH3PbI3 perovskite/C60/bathocuproine/aluminum is free of a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (
PSS) layer to achieve an open-circuit voltage (VOC) = 1.02 V, a short-circuit current (JSC) = 18.92 mA/cm(2), and a fill factor (FF) = 0.78, corresponding to a power conversion efficiency (PCE) of 15.17% under standard 1 sun AM 1.5G simulated solar irradiation. The performance is much superior to the device applying the
PSS interlayer with photovoltaic parameters of VOC = 0.85 V, JSC = 16.37 mA/cm(2), and FF = 0.74, corresponding to a PCE of 10.27%. Additionally, we had applied a UV-assisted process to polymerize the VB-DAAF film at relatively lower temperature and fabricate decent perovskite-based solar cells on the flexible substrate for real applications.
对苯乙烯官能化的9,9-二芳基芴基三芳基二胺单体（VB-DAAF）进行热固化，可形成一种理想的p型有机电极夹层，该夹层能够在制备甲基铵碘化铅（CH3NH3PbI3）钙钛矿/富勒烯（C60）平面异质结混合太阳能电池时抵抗极性前驱体溶液的溶剂化作用。聚合后的VB-DAAF薄膜与CH3NH3PbI3钙钛矿的价带边缘能级呈现出良好的能级匹配，有利于空穴传输。对于CH3NH3PbI3钙钛矿的导带边缘能级而言，存在较大的能垒，这有效地阻止了电子到达正极，并减少了由于复合导致的光子能量损失。具有玻璃/氧化铟锡/聚合VB-DAAF/CH3NH3PbI3钙钛矿/C60/浴铜灵/铝结构的性能最佳的电池，不含聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）层，在标准1太阳AM 1.5G模拟太阳光照下，开路电压（VOC）=1.02V，短路电流（JSC）=18.92mA/cm²，填充因子（FF）=0.78，对应的功率转换效率（PCE）为15.17%。该性能远优于应用PEDOT:PSS夹层的器件，其光伏参数为VOC = 0.85V，JSC = 16.37mA/cm²，FF = 0.74，对应的PCE为10.27%。此外，我们采用了紫外线辅助工艺在相对较低的温度下聚合VB-DAAF薄膜，并在柔性基板上制备出性能良好的钙钛矿基太阳能电池，以用于实际应用。
