Fibrous CdS/CdSe quantum dot co-sensitized solar cells based on ordered TiO₂nanotube arrays

Abstract

A new kind of fibrous quantum dot sensitized solar cell has been designed and fabricated by using CdS and CdSe co-sensitized TiO(2) nanotubes on Ti wire as the photoanode and highly active Cu(2)S as the counter electrode. By optimizing the CdSe deposition time and the length of the nanotube, a power conversion efficiency of 3.18% has been obtained under AM 1.5 illumination (100 mW cm(-2)). The potential application of this kind of solar cell has also been discussed in this paper.

CuInS2/Mn-CdS quantum dot co-sensitized flexible solar cells based on single fibrous TiO2 nanowire arrays

“…Figure 2a shows FESEM image of top view of as-prepared fibrous TiO 2 NWAs on Ti wire with 48 h hydrothermal process. Comparing with the TiO 2 nanotube on Ti Scheme 1 Diagram of the preparation process of fibrous electrode: a single Ti wire; b fibrous TiO 2 NWAs/Ti wire; c fibrous CuInS 2 /CdS quantum dot co-sensitized TiO 2 photoanode; d fibrous photoanode twisted with Cu 2 S/ brass counter electrode wire in previous reports, there have no cracks on the surface of Ti wire, which can indicate the excellent interface connection between the TiO 2 NWAs and Ti wire substrate [23]. These uniform and stable nanomaterials are employed as the photoanode of fibrous solar cells, and it will obtain a considered photovoltaic performance.…”

“…The metal fibrous substrate has excellent flexible possibility, and it can support high sintering temperature, which can be easily fabricated in the high-performance flexible devices. Till now, TiO 2 nanotube arrays have been prepared on the Ti wires as the photoanode of QDSSCs, which have obtained a good photovoltaic efficiency [19][20][21][22][23]. However, the interface connection between the TiO 2 and Ti wire substrate, and the uniformity of the TiO 2 nanomaterials are needed to be improved.…”

Photoelectrolchemical performance of PbS/CdS quantum dots co-sensitized TiO2 nanosheets array film photoelectrodes

“…One of the sensitizer can act as a buffer layer to control the band alignments of semiconductor at the interface, modifying the surface states and reducing recombination of photogenerate carriers [33]. QDs co-sensitized one-dimensional TiO 2 -based film nanostructures photoelectrodes for sensitized solar cells has been investigated, including nanotubes [34], nanorods [35]. However, few works have been carried out on QDs co-sensitized {001} facetdominated single crystalline anatase TiO 2 NSs array film photoanode.…”

Efficiency improvement of quantum dot sensitized solar cells with inserting ZnS layer in the photoanode

“…The as-prepared photoanode was passivated with ZnS, and the aqueous solution of Zn(CH 3 COO) 2 and Na 2 S was respectively used in the SILAR method; the details can be found in Ref. [14]. The Pt-coated FTO glass was used as counter electrode for QDSSC, and a mixture of Na 2 S (1 M), S (0.1 M), and KCl (0.2 M) in a water/methanol (1:1 by volume) solution was used as electrolyte [7,8].…”