Tran Quang Nhat, Lee Ho Kyung, Kim Ji Hyeon, Park Sang Joon
Department of Chemical and Biological Engineering, Gachon University, Seongnam, Gyeonggi 461-701, Korea.
J Nanosci Nanotechnol. 2020 Jan 1;20(1):304-311. doi: 10.1166/jnn.2020.17253.
Department of Chemical and Biological Engineering, Gachon University, Seongnam, Gyeonggi 461-701, Korea Among metallic nanomaterials used as plasmonic structures in organic photovoltaics (OPVs), gold (Au) and silver (Ag) nanoparticles (NPs) have attracted significant attention owing to their remarkable localized surface plasmon resonance optical properties and relatively high scattering efficiency. In this study, we propose rough-surface Au@Ag core-shell NPs (RSAu@Ag NPs) as an advanced plasmonic material to combine the high scattering power of Ag NPs and broad spectral response of Au NPs in the long-wavelength range. We coat an Au nanoflower core with a thin Ag shell to fabricate the RSAu@Ag NPs. Highly efficient plasmonic organic solar cells were fabricated by embedding RSAu@Ag NPs at the bottom of the organic active layer consisting of a polymer blend of poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4,7(2,1,3-benzothiadiazole)]. The size, controlled morphology, and distribution of the metallic NPs are considered to determine the plasmonic effect, as these are the main factors contributing to the light absorption enhancement and power conversion efficiency of an OPV device.
韩国京畿道城南市 461 - 701 加昌大学化学与生物工程系 在用作有机光伏（OPV）中表面等离子体激元结构的金属纳米材料中，金（Au）和银（Ag）纳米颗粒（NPs）因其显著的局域表面等离子体共振光学性质和相对较高的散射效率而备受关注。在本研究中，我们提出粗糙表面的 Au@Ag 核壳纳米颗粒（RSAu@Ag NPs）作为一种先进的表面等离子体激元材料，以结合 Ag NPs 的高散射能力和 Au NPs 在长波长范围内的宽光谱响应。我们用薄 Ag 壳包覆 Au 纳米花核来制备 RSAu@Ag NPs。通过将 RSAu@Ag NPs 嵌入由聚[2,6 -（4,4 - 双 -（2 - 乙基己基）- 4H - 环戊并[2,1 - b;3,4 - b']二噻吩）- alt - 4,7（2,1,3 - 苯并噻二唑）]的聚合物共混物组成的有机活性层底部，制备了高效的表面等离子体激元有机太阳能电池。金属 NPs 的尺寸、可控形态和分布被认为决定了表面等离子体激元效应，因为这些是有助于提高 OPV 器件光吸收和功率转换效率的主要因素。
