Hou Xueyan, Duan Xiaohan, Liang Mengnan, Wang Zixuan, Yan Dong
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China.
Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528225, China.
Materials (Basel). 2023 Mar 25;16(7):2613. doi: 10.3390/ma16072613.
Fullerene-based indoor OPVs, particularly phenyl-C butyric acid methyl ester (PCBM), has been regarded as a prospective harvesting indoor light energy source to drive low-power consumption electronic devices such as sensors and IoTs. Due to the low tunability of its inherently spherical structure, the performance of the fullerene-based indoor OPVs seem to hit a bottleneck compared with the non-fullerene materials. Here, we explore the potential application of fullerene derivative bis-PCBM in indoor OPVs, which owns a higher the lowest unoccupied molecular orbital (LUMO) level than PCBM. The results show that when blended with PCDTBT, bis-PCBM devices yield a high of up to 1.05 V and 0.9 V under AM 1.5G illumination and 1000 lx indoor light, compared with the corresponding values of 0.93 V and 0.79 V for PCBM devices. Nevertheless, the disorders in bis-PCBM suppress the and FF and, therefore, result in a lower efficiency compared to PCBM devices. However, the efficiency and stability differences between the two kinds of cells were much reduced under indoor light conditions. After further optimization of the material composition and fabrication process, bis-PCBM could be an alternative to PCBM, offering great potential for indoor OPV with high performance.
基于富勒烯的室内有机光伏器件，尤其是苯基 - C丁酸甲酯（PCBM），被视为一种有望收集室内光能以驱动传感器和物联网等低功耗电子设备的能源。由于其固有的球形结构可调性低，与非富勒烯材料相比，基于富勒烯的室内有机光伏器件的性能似乎遇到了瓶颈。在此，我们探索富勒烯衍生物双PCBM在室内有机光伏器件中的潜在应用，其最低未占据分子轨道（LUMO）能级比PCBM更高。结果表明，与PCDTBT混合时，双PCBM器件在AM 1.5G光照和1000勒克斯室内光下分别产生高达1.05伏和0.9伏的高开路电压，而PCBM器件的相应值为0.93伏和0.79伏。然而，双PCBM中的无序性抑制了短路电流密度和填充因子，因此与PCBM器件相比导致效率较低。然而，在室内光照条件下，两种电池之间的效率和稳定性差异大大减小。经过材料组成和制造工艺的进一步优化，双PCBM可能成为PCBM的替代品，为高性能室内有机光伏器件提供巨大潜力。
