Study On Carbon Counter Electrode Of Mesoscopic Solar Cell

Mesoscopic solar cell is famous for its unique mesoporous structure. This unique structure possesses larger specific surface area, helping the capture of photons and the output of photocurrent. Up to now, the certified efficiency of Mesoscopic solar cell has reached 20.1%. Moreover, mesoscopic solar cell is considered as one of the most potential alternative to replace the traditional silicon solar cell, because of its simpler manufacturing process, cheaper materials and also its higher efficiency.Counter electrode is the essential part of mesoscopic solar cell, which is responsible for collecting electronics and reducing the oxidized redox species or the hole transport materials. Therefore, counter electrodes have to possess good electrical conductivity and catalytic activity. Until now, Pt and Au are the most common counter electrode in Mesoscopic solar cell. However, Pt and Au are rare metals and usually processed by vacuum evaporation method, which raises the cost of manufacture. Therefore, our group choose the printable carbon materials as counter electrodes, which not only save the cost of materials but also the cost of manufacture.Based on carbon counter electrodes(CCEs), in this thesis, the effect of components of counter electrode on the performance of different kinds of solar cell is investigated. The main contents of this thesis include: Firstly, the effect of size of graphite on liquid dye sensitized solar cell and fully printable mesoscopic perovskite solar cell are investigated.Finally, the CCEs based on 8 ?m graphite obtain the efficiency of 6.11% and 11.84%,respectively. Secondly, 50 nm polyaniline carbonized fiber is synthetized by a rapidly mixed method and mixed together with graphite, which is applied on the fully printable mesoscopic solar cell as counter electrode and obtained a efficiency of 11.84%.