[18p-P4-1~48] 12.5 Organic solar cells

▲ [18p-P4-30] Improvement of Inverted Organic Thin-film Solar Cells by Incorporation of Gold Quantum Dots/Plasmonic Systems

〇(D)KULRISA KUNTAMUNG^1,2, Kontad Ounnunkad², Chutiparn Lertvachirapaiboon¹, Kazunari Shinbo¹, Keizo Kato¹, Akira Baba¹ (1.Niigata Univ., 2.Chiang Mai Univ.)

Keywords:gold quantum dots, Plasmonic Systems

In this work, we studied the enhancement of inverted organic thin-film solar cells (OSCs) by incorporating gold quantum dots (AuQDs) with plasmonic systems. [1-3]. Three types of AuQDs with different emission wavelengths: blue (B-AuQDs); green (G-AuQDs); and red (R-AuQDs) were loaded into a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonat) thin-film layer of inverted OSCs. The grating structures were fabricated on P3HT:PCBM layers by nanoimprinting technique. The fabricated the solar cell devices consisted of ITO/TiO₂/P3HT:PCBM/PEDOT:PSS:AuQDs/silver structure, as shown in Fig.1. The fabricated devices were studied by UV-vis spectroscopy, atomic force microscopy (AFM) images, J-V characteristic, and impedance spectroscopy. We also studied the effect of AuQDs concentrations in PEDOT:PSS with different concentrations 0-7.00 µM. AuQDs were used as photosensitizers to develop photoelectric conversion properties of solar cells. The power conversion efficiency of the inverted OSCs with AuQDs was higher than that of a reference cell without AuQDs, as shown in Fig.2. Furthermore, AuQDs-OSCs were combined with plasmonic systems (e.g. AuNPs and grating-coupled surface plasmons) on metallic gratings for increasing efficiency of inverted OSCs.