Recent progress in interface modification for dye-sensitized solar cells

Abstract

Interface modification on the TiO 2 /dye/electrolyte interface of dye-sensitized solar cells (DSCs) is one of the most effective approaches to suppress the charge recombination, improve electron injection and transportation, and thus ameliorate the conversion efficiency and stability of DSCs. Conventional research focusing on the photoanodes interface modification before sensitization in dye-sensitized solar cells has been carried out and reviewed. However, recent studies showed that post-modification after sensitization of the TiO 2 electrode also plays a significant role on the TiO 2 /dye/electrolyte interface. This post-modification using the immersing method could deprotonate dye molecules, prohibit the dye aggregation and retard the recombination reaction. As a result, it has great influence on the devices' photovoltaic performance. This interface modification could also provide an approach to broaden the response of the solar spectrum by introducing an alternative assembling structure. An in-situ meaning of using a co-adsorbent is employed to modify the interface in the DSCs, which could retard the aggregation of the dye molecules and enhance the conversion efficiency. In addition, electrolyte additives can be used to modify the TiO 2 /dye/electrolyte interface through some unique mechanisms. Based on the background of interface modification of photoanodes before sensitization, this review introduces various interface modifications after sensitization of dye-sensitized solar cells and their mechanisms.dye-sensitized solar cell, TiO 2 electrode, interface modification, electron recombination

Review on the Application of SnO2 in Perovskite Solar Cells

“…Photoanode modifications are frequently used to improve electron injection and suppress electron recombination . Elemental doping, combination with other ETLs, and surface modification were frequently used in photoanodes modification.…”

“…[3i,84] It can also improve the morphology of the active absorber layer, the work function of contact layers, the intimacy of the contact at the interface, and the long‐term stability of the devices. [78b,85] Currently, inorganic metal oxides (TiO 2, MgO , Sb 2 O 3 , ZnO) and organics such as self‐assembling monolayers (SAM), polymers, carbon based materials are used to combine with or modify SnO 2 in PSCs, all of which are included in Table 6 .…”

Solid‐state dye‐sensitized and bulk heterojunction solar cells using TiO2 and ZnO nanostructures: recent progress and new concepts at the borderline

“…Several strategies can be used to reduce these loss mechanisms, such as interfacial modifications of TiO 2 with insulating or wider bandgap materials 106. Considering the focus of this review on metal oxides for photovoltaic energy conversion, the reader is referred to reports dedicated to these aspects for further details 22, 107…”

水热法可控合成二氧化钛纳米晶及其在染料敏化太阳能电池中的应用

“…该波段与 染料吸收波段相对应, 因此较高浓度染料吸附量有 利于提高该波段 IPCE 数值 [16] . 在 570~750 nm 长波 段区域, 含用 TMAOH 胶化剂合成的二氧化钛纳 米晶颗粒构建的光阳极 DSSC IPCE 数值略高于其它 两个样品, 这与其具有较大粒径和较高散射率相对 应 [17] . 但是其散射能力还是太弱, 不足以有效提高 DSSC 在此波段的 IPCE 数值 [18] .…”