Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices , South China University of Technology , Guangzhou 510640 , P. R. China.
Institut für Organische Chemie & Center for Nanosystems Chemistry , Universität Würzburg , Am Hubland , Würzburg 97074 , Germany.
ACS Appl Mater Interfaces. 2019 Sep 18;11(37):34151-34157. doi: 10.1021/acsami.9b10514. Epub 2019 Sep 4.
A perylene bisimide functionalized with four 4-carboxyphenoxy substituents at bay area (PBI-COOH) was embedded in sol-gel-derived zinc oxide (ZnO) to fabricate organic-inorganic hybrid photoconductive cathode interlayers (ZnO:PBI-COOH) that can be annealed at a rather low temperature of 120-130 °C as desired for plastic substrates for flexible devices. For these interlayers, the structural defects including oxygen vacancy and residual hydroxy groups are reduced that leads to increased electron mobility, and a photoinduced electron transfer from the organic dopant into the conduction band of ZnO endows the hybrid thin film with relatively higher conductivity when compared to the undoped ZnO thin film. The low-temperature-processed hybrid thin films were applied on indium tin oxide electrodes to produce inverted organic solar cells (OSCs) with power conversion efficiencies of 11.68 and 13.48% when using J71:ITIC and PBDB-T-2Cl:IT4F as active layers, respectively. Finally, flexible OSCs are fabricated on poly(ethylene terephthalate) substrates that maintained stability with relatively high performance after 100 times bending.
四个 4-羧基苯氧基取代的苝二酰亚胺功能化的边位（PBI-COOH）被嵌入溶胶-凝胶衍生的氧化锌（ZnO）中，以制备可在 120-130°C 的较低温度下退火的有机-无机杂化光电导阴极层（ZnO：PBI-COOH），这对于柔性器件的塑料衬底是理想的。对于这些层，减少了包括氧空位和残留羟基在内的结构缺陷，导致电子迁移率增加，并且有机掺杂剂从光诱导电子转移到 ZnO 的导带赋予了杂化薄膜相对较高的电导率，与未掺杂的 ZnO 薄膜相比。低温处理的杂化薄膜应用于铟锡氧化物电极上，分别使用 J71：ITIC 和 PBDB-T-2Cl：IT4F 作为活性层，制备了功率转换效率为 11.68%和 13.48%的倒置有机太阳能电池（OSC）。最后，在聚对苯二甲酸乙二醇酯衬底上制备了柔性 OSC，在经过 100 次弯曲后仍保持相对较高的性能和稳定性。
