Department of Materials and Chemical Engineering, Hanyang University, Ansan, Kyounggi 426-791, Republic of Korea.
Nanotechnology. 2017 Apr 18;28(15):155402. doi: 10.1088/1361-6528/aa63b9.
Hybrid organic-inorganic photovoltaic devices consisting of poly(3,4-etyhlenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and n-type silicon have recently been investigated for their cost-efficiency and ease of fabrication. We demonstrate that the insertion of an ultrathin AlO layer between n-Si and PEDOT:PSS significantly improves photovoltaic performance in comparison to the conventional interfacial oxide employing SiO. A power-conversion efficiency of 11.46% was recorded at the optimal AlO thickness of 2.3 nm. This result was achieved based upon increased built-in potential and improved charge collection via the electron blocking effect of AlO. In addition, the hydrophilicity enhanced by AlO improved the coating uniformity of the PEDOT:PSS layer, resulting in a further reduction in surface recombination.
由聚（3,4-乙二氧基噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）和 n 型硅组成的混合有机-无机光伏器件因其成本效益和易于制造而最近受到了研究。我们证明，与采用 SiO 的传统界面氧化物相比，在 n-Si 和 PEDOT：PSS 之间插入超薄的 AlO 层可显著提高光伏性能。在最佳的 2.3nm AlO 厚度下，记录到 11.46%的功率转换效率。这一结果是通过 AlO 的电子阻挡效应提高内置电势和改善电荷收集实现的。此外，AlO 增强的亲水性改善了 PEDOT：PSS 层的涂覆均匀性，从而进一步减少了表面复合。
