ACS Appl Mater Interfaces. 2018 Apr 18;10(15):13113-13123. doi: 10.1021/acsami.8b02987. Epub 2018 Apr 9.
Biomimetic microarchitectured polymer layers, such as inverted hemispherical architectured (IHSA)-polydimethylsiloxane (PDMS) and hemispherical architectured (HSA)-PDMS layers, were prepared by a simple and cost-effective soft-imprinting lithography method via a hexagonal close-packed polystyrene microsphere array/silicon mold. The IHSA-PDMS/glass possessed superior antireflection (AR) characteristics with the highest/lowest average transmittance/reflectance ( T/ R) values of approximately 89.2%/6.4% compared to the HSA-PDMS/glass, flat-PDMS/glass, and bare glass ( T/ R ∼88.8%/7.5%, 87.5%/7.9%, and 87.3%/8.8%, respectively). In addition, the IHSA-PDMS/glass also exhibited a relatively strong light-scattering property with the higher average haze ratio ( H) of ∼38% than those of the bare glass, flat-PDMS/glass, and HSA-PDMS/glass (i.e., H ≈ 1.1, 1.7, and 34.2%, respectively). At last, to demonstrate the practical feasibility under light control of the solar cells, the IHSA-PDMS was laminated onto the glass substrates of perovskite solar cells (PSCs) as an AR layer, and their device performances were explored. Consequently, the short-circuit current density of the PSCs integrated with the IHSA-PDMS AR layer was improved by ∼17% when compared with the device without AR layer, resulting in the power conversion efficiency (PCE) up to 19%. Therefore, the IHSA-PDMS is expected to be applied as an AR layer for solar cells to enhance their light absorption as well as the PCE.
仿生微结构聚合物层，如倒半球形结构（IHSA）-聚二甲基硅氧烷（PDMS）和半球形结构（HSA）-PDMS 层，通过一种简单且具有成本效益的软压印光刻法，利用六方密堆积聚苯乙烯微球阵列/硅模具制备。与 HSA-PDMS/玻璃、平整 PDMS/玻璃和裸玻璃相比，IHSA-PDMS/玻璃具有优异的抗反射（AR）特性，平均透光率/反射率（T/R）最高/最低值约为 89.2%/6.4%（T/R 约为 88.8%/7.5%、87.5%/7.9%和 87.3%/8.8%）。此外，IHSA-PDMS/玻璃还表现出较强的光散射特性，平均雾度比约为 38%，高于裸玻璃、平整 PDMS/玻璃和 HSA-PDMS/玻璃（即 H 约为 1.1%、1.7%和 34.2%）。最后，为了展示在太阳能电池光控下的实际可行性，将 IHSA-PDMS 层压到钙钛矿太阳能电池（PSC）的玻璃基板上作为 AR 层，并探索了它们的器件性能。结果表明，与没有 AR 层的器件相比，集成了 IHSA-PDMS AR 层的 PSC 的短路电流密度提高了约 17%，从而使功率转换效率（PCE）提高到 19%。因此，IHSA-PDMS 有望作为太阳能电池的 AR 层，以提高其光吸收和 PCE。
