Oxygenated multi-walled carbon nanotubes (OMWNTs) were employed as additives in conventional TiO₂-based photoanodes and platinum-free conducting polymer-based photocathodes. The OMWNTs were induced to form covalent bonds with TiO₂ nanoparticles (NPs) and were successfully intercalated into a poly (3, 4-ethylenedioxy-thiophene)-polystyrene sulfonate (PEDOT:PSS) network. Furthermore, a dye-sensitized TiO₂-OMWNT-based photoanode and a PEDOT:PSS-OMWNT-based electrocatalytic photocathode were both assembled into a photoelectrochemical cell. Replacing the typical platinized photocathode with PEDOT:PSS-OMWNTs enhances the energy conversion efficiency by approximately 13.9% when compared to a typical dye-sensitized solar cell composed of FTO/TiO₂/N719//Pt/FTO. Similarly, a 25.6% increase in efficiency was observed by a spray-coated TiO₂-OMWNT layer as the photoanode instead of simple anatase TiO₂ NPs. In addition, 42.9% higher efficiency was achieved by utilizing the two OMWNT-modified electrodes together. This excellent performance is attributed to the synergistic effect of the OMWNT-modified photoanode and photocathode. This may be related to the effective suppression of unwanted back transport and recombination reactions.

氧化多壁碳纳米管 (OMWNT) 被用作常规 TiO ₂基光阳极和无铂导电聚合物基光电阴极中的添加剂。OMWNTs 被诱导与 TiO ₂纳米粒子 (NPs)形成共价键，并成功插入到聚 (3, 4-亚乙基二氧基-噻吩)-聚苯乙烯磺酸盐 (PEDOT:PSS) 网络中。此外，染料敏化的 TiO ₂ -OMWNT 基光阳极和 PEDOT:PSS-OMWNT 基电催化光阴极均组装成光电化学电池。与由 FTO/TiO ₂组成的典型染料敏化太阳能电池相比，用 PEDOT:PSS-OMWNT 代替典型的镀铂光电阴极可将能量转换效率提高约 13.9%/N719//Pt/FTO。类似地，通过喷涂 TiO ₂ -OMWNT 层作为光阳极而不是简单的锐钛矿 TiO ₂ NPs观察到效率提高了 25.6% 。此外，通过同时使用两个 OMWNT 修饰的电极，效率提高了 42.9%。这种优异的性能归因于 OMWNT 改性的光电阳极和光电阴极的协同效应。这可能与有效抑制不需要的回输和重组反应有关。