Lee Kang-Hun, Han Seung-Hee, Chuquer Ana, Yang Hwa-Young, Kim Jaehi, Pham Xuan-Hung, Yun Won-Ju, Jun Bong-Hyun, Rho Won-Yeop
School of International Engineering and Science, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Korea.
School of Bioenvironmental Chemistry, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Korea.
Nanomaterials (Basel). 2021 Jan 27;11(2):328. doi: 10.3390/nano11020328.
The development of high efficiency dye-sensitized solar cells (DSSCs) has received tremendous attention. Many researchers have introduced new materials for use in DSSCs to achieve high efficiency. In this study, the change in power conversion efficiency (PCE) of DSSCs was investigated by introducing two types of materials-Au nanoparticles (Au NPs) and a scattering layer. A DSSC fabricated without neither Au NPs nor a scattering layer achieved a PCE of 5.85%. The PCE of a DSSC based on freestanding TiO nanotube arrays (f-TNTAs) with Au NPs was 6.50% due to better electron generation because the plasmonic absorption band of Au NPs is 530 nm, which matches the dye absorbance. Thus, more electrons were generated at 530 nm, which affected the PCE of the DSSC. The PCE of DSSCs based on f-TNTAs with a scattering layer was 6.61% due to better light harvesting by scattering. The scattering layer reflects all wavelengths of light that improve the light harvesting in the active layer in DSSCs. Finally, the PCE of DSSCs based on the f-TNTAs with Au NPs and a scattering layer was 7.12% due to the synergy of better electron generation and light harvesting by plasmonics and scattering. The application of Au NPs and a scattering layer is a promising research area for DSSCs as they can increase the electron generation and light harvesting ability.
高效染料敏化太阳能电池（DSSC）的发展受到了极大关注。许多研究人员已引入新材料用于DSSC以实现高效率。在本研究中，通过引入两种材料——金纳米颗粒（Au NPs）和散射层，研究了DSSC的功率转换效率（PCE）变化。未添加Au NPs和散射层制备的DSSC的PCE为5.85%。基于带有Au NPs的独立式TiO纳米管阵列（f-TNTAs）的DSSC的PCE为6.50%，这是因为Au NPs的等离子体吸收带为530 nm，与染料吸光度匹配，从而具有更好的电子产生效果。因此，在530 nm处产生了更多电子，这影响了DSSC的PCE。基于带有散射层的f-TNTAs的DSSC的PCE为6.61%，这是由于散射作用实现了更好的光捕获。散射层反射所有波长的光，从而改善了DSSC活性层中的光捕获。最后，基于带有Au NPs和散射层的f-TNTAs的DSSC的PCE为7.12%，这是由于等离子体和散射作用在更好的电子产生和光捕获方面产生了协同效应。Au NPs和散射层的应用对于DSSC来说是一个有前景的研究领域，因为它们可以提高电子产生和光捕获能力。
