Ibrahem Mohammed A, Rasheed Bassam G, Canimkurbey Betul, Adawi Ali M, Bouillard Jean-Sebastien G, O'Neill Mary
Laser Sciences and Technology Branch, Applied Sciences Department, University of Technology, Baghdad 10066, Iraq.
Laser and Optoelectronics Engineering Department, College of Engineering, Al Nahrain University, Baghdad 10066, Iraq.
ACS Omega. 2025 Jan 13;10(3):2849-2857. doi: 10.1021/acsomega.4c08801. eCollection 2025 Jan 28.
We investigate the enhancement in the efficiency of organic bulk heterojunction solar cells enabled by plasmonic excitation of Ag nanoparticles (NPs) of different diameters (10, 20, and 30 nm), randomly incorporated within an optical spacing layer of TiO placed between the organic medium and the Ag cathode. Such structures significantly increase the optical absorption and the photocurrent within the device system, leading to a power conversion efficiency of more than 4%, over 2.5 times that of the control bulk heterojunction cell. This corresponds to a 61% increase in and a 6.3% in fill factor. 3D Finite-difference time-domain simulations were utilized to investigate the plasmonic field coupling within the nanogap medium of TiO. They show that coupling between the Ag nanoparticle and the Ag thin film cathode extends the wavelength range of the local field enhancement beyond that obtained for isolated NPs, providing a better overlap with the absorption spectrum of the organic medium.
我们研究了通过在有机介质和银阴极之间的TiO光学间隔层中随机掺入不同直径（10、20和30纳米）的银纳米颗粒（NP）的等离子体激发，实现有机本体异质结太阳能电池效率的提高。这种结构显著增加了器件系统内的光吸收和光电流，导致功率转换效率超过4%，是对照本体异质结电池的2.5倍以上。这对应于短路电流增加61%，填充因子增加6.3%。利用三维时域有限差分模拟研究了TiO纳米间隙介质内的等离子体场耦合。结果表明，银纳米颗粒与银薄膜阴极之间的耦合将局部场增强的波长范围扩展到了孤立纳米颗粒所获得的范围之外，从而与有机介质的吸收光谱有更好的重叠。
