作者:Woochul Lee、Tae-Hyuk Kwon、Jongchul Kwon、Ji-young Kim、Changhee Lee、Jong-In Hong
DOI:10.1039/c1nj20446g
日期:——
The photovoltaic performance of devices fabricated using three iridium complexes (1, 2, and 3) containing different main ligands (1-phenylisoquinoline, (4-isoquinolin-1-yl-phenyl)diphenylamine, and 1-pyren-1-yl-isoquinoline for 1, 2, and 3, respectively) was investigated. Two different devices, one fabricated by spin coating and one produced by vacuum deposition, were tested. Among the bulk heterojunction solar cells (BHJCs) fabricated by spin coating, the cell fabricated using 2 had the highest power conversion efficiency (PCE, 0.50%). The PCEs of 1 and 3 were 0.43% and 0.34%, respectively. These results suggested that the superior hole-transport ability of the triphenylamine moiety in 2 was responsible for the high photovoltaic performance of the device fabricated using this complex. This assumption was confirmed by fabricating electron-only devices using the three Ir complexes and comparing the turn-on voltage of each device. The photovoltaic performance of device C fabricated by the vacuum co-deposition of 2 and C60 in a 50 nm-thick active layer was 50% higher than that of device A (bilayer heterojunction solar cell) and device B (fabricated by the co-deposition of 2 and C60 with a 30 nm-thick active layer).
研究人员使用含有不同主配体(1-苯基异喹啉、(4-异喹啉-1-基-苯基)二苯胺和 1-芘-1-基-异喹啉,分别为 1、2 和 3)的三种铱配合物(1、2 和 3)制造了装置的光伏性能。测试了两种不同的器件,一种是通过旋涂法制造的,另一种是通过真空沉积法制造的。在通过旋涂法制造的体异质结太阳能电池(BHJC)中,使用 2 制造的电池具有最高的功率转换效率(PCE,0.50%)。1和3的功率转换效率分别为0.43%和0.34%。这些结果表明,2 中的三苯胺分子具有卓越的空穴传输能力,是使用这种复合物制造的器件具有高光电性能的原因。通过使用这三种铱复合物制作纯电子器件并比较每个器件的开启电压,证实了这一假设。通过真空共沉积 50 纳米厚活性层中的 2 和 C60 制成的器件 C 的光电性能比器件 A(双层异质结太阳能电池)和器件 B(通过共沉积 30 纳米厚活性层中的 2 和 C60 制成)高出 50%。