Assessing the Photovoltaic Quality of Vacuum-Thermal Evaporated Organic Semiconductor Blends
Assessing the Photovoltaic Quality of Vacuum-Thermal Evaporated Organic Semiconductor Blends
复制标题
DOI：
10.1002/adma.202107584
复制
发表时间：
2021-12-19
影响因子：
29.4
通讯作者：
Riede, Moritz K.
中科院分区：
文献类型：
--
作者：
Kaienburg, Pascal;Jungbluth, Anna;Riede, Moritz K.
光热蒸发（VTE）是有机太阳能电池（OSC）的高度相关的制造路线，特别是在工业规模上，如通过基于有机发光二极管的显示器的商业化所证明的。虽然OSC性能报告的VTE沉积的分子的范围内，供体：受体共混物的性能相对于其光伏性能的全面评估是稀缺的。在这里，三个选择系统的有机薄膜和太阳能电池的制造和椭圆偏振法，具有高动态范围的外部量子效率，以及OTRACE进行测量，以量化吸收，电压损耗和载流子迁移率。这些参数是解释OSC性能的关键，并将有助于合理化文献中报告的其他材料系统的性能，因为作者的方法适用于VTE系统之外。此外，它可以帮助判断新分子的前景。作者发现测量值存在很大差异，并发现今天的VTE OSC可以达到高消光系数，但与溶液处理的同类产品相比，只有中等的迁移率和电压损失。概述了VTE OSC需要改进的内容，以便在功率转换效率方面再次赶上其解决方案处理的同行。
Vacuum-thermal evaporation (VTE) is a highly relevant fabrication route for organic solar cells (OSCs), especially on an industrial scale as proven by the commercialization of organic light emitting diode-based displays. While OSC performance is reported for a range of VTE-deposited molecules, a comprehensive assessment of donor:acceptor blend properties with respect to their photovoltaic performance is scarce. Here, the organic thin films and solar cells of three select systems are fabricated and ellipsometry, external quantum efficiency with high dynamic range, as well as OTRACE are measured to quantify absorption, voltage losses, and charge carrier mobility. These parameters are key to explain OSC performance and will help to rationalize the performance of other material systems reported in literature as the authors' methodology is applicable beyond VTE systems. Furthermore, it can help to judge the prospects of new molecules in general. The authors find large differences in the measured values and find that today's VTE OSCs can reach high extinction coefficients, but only moderate mobility and voltage loss compared to their solution-processed counterparts. What needs to be improved for VTE OSCs is outlined to again catch up with their solution-processed counterparts in terms of power conversion efficiency.