Zn-doped nanocrystalline TiO2 films for CdS quantum dot sensitized solar cells

Abstract

Quantum dot-sensitized solar cells based on Zn-doped TiO(2) (Zn-TiO(2)) film photoanode and polysulfide electrolyte were fabricated. Zn-TiO(2) nanoparticles were obtained via a hydrothermal method and screen printed on the fluorine-doped tin oxide glass to prepare the photoanode. The structure, morphology and impedance of the Zn-TiO(2)/CdS film and the photovoltaic performance of the Zn-TiO(2)/CdS cell were investigated. It was found that the photovoltaic efficiency was improved by 24% when the Zn-TiO(2) film was adopted as the photoanode of CdS QDSSCs instead of only the TiO(2) layer. The improvement was ascribed to the reduction of electron recombination and the enhancement of electron transport in the TiO(2) film by Zn doping.

Quantum dot sensitized solar cell: Recent advances and future perspectives in photoanode

“…Alternatively, Zhu et al prepared Zn doped TiO 2 based photoanode for CdS QDSSC and observed enhanced photocurrent response and improved net photo conversion efficiency [110].…”

Cascade structure of TiO2/ZnO/CdS film for quantum dot sensitized solar cells

“…SSCs are based on the photosensitization of nanocrystalline TiO 2 or ZnO semiconductor photoanode by absorbed dye or quantum dot (QD) sensitizers. As a key component of SSCs, the structure, size, characteristics of photoanode have been studied to improve SSC efficiency [17][18][19][20][21][22][23][24]8]. Many studies have also devoted to explore more sophisticated structures to optimize the performance of photoanode.…”

Enhanced Efficiency of Nanoporous-layer-covered TiO2NanotubeArrays for Front Illuminated Dye-sensitized Solar Cells

“…3) and charge transfer resistance at the TiO 2 /dye/electrolyte (R3, inset Fig. 3) [17]. The FTO/Type II TNT exhibited a much smaller R3 value, indicating faster charge transfer kinetics.…”