Constructing aligned single-crystalline TiO 2 nanorod array photoelectrode for PbS quantum dot-sensitized solar cell with high fill factor

Quantum dot-sensitized solar cells

“…115,[117][118][119] Nevertheless, it is well known that the electron transport in NP based film is unordered, resulting in a long electron transport length to the conductive substrate and therefore increasing the charge recombination probability. Thus, aiming at realizing a faster electron transport channel, one-dimensional (1D) structured TiO2, such as nanotube (TiO2-NT), [121][122][123][124][125][126][127][128][129][130][131] nanorod (TiO2-NR), [132][133][134][135][136][137][138][139][140] and nanowire (TiO2-NW) [141][142][143][144][145] have been explored as ETM in QDSCs to facilitate faster electron transfer to conductive substrate. It is believed that the 1D structure of ETM can provide a smoother electron transport tunnel and thus decrease the recombination loss.…”

Enhanced film quality of PbS QD solid by eliminating the oxide traps through an in situ surface etching and passivation

“…1b-d show the elemental mapping of Pb, S and I throughout the film thickness in the rectangular area indicated in Fig. 1 29,30 The peaks at higher binding energies of 138.77 eV and 143.63 eV are assigned to Pb 4f in PbSO 4 , indicating the presence of PbSO 4 in the pristine PbS/TiO 2 film, 28,31 which is further confirmed by the high-resolution S 2p spectrum. As shown in Fig.…”

Engineering the synthesized colloidal CuInS2 passivation layer in interface modification for CdS/CdSe quantum dot solar cells

“…3 Quantum dot (QD) sensitizers as a core part of QDSCs have become an important research direction, including size-dependent quantum dots, 4 alloyed QDs, 5 co-sensitization QDs, 6,7 and ion-doped QDs. 8 Currently, various QDs have been investigated, such as CdS, 4,9 CdSe, 10 PbS, 6,11,12 SnSe 13 and Sb 2 S 3 . 14 In cadmium sulfide materials, nanocomposite CdS/CdSe QD sensitizers form a step-like energy band structure, so that the photogenerated carriers can be better arranged on the photoanode, thus reducing recombination loss.…”