Amorphous TiO₂ Buffer Layer Boosts Efficiency of Quantum Dot Sensitized Solar Cells to over 9%

Abstract

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Recent progress on quantum dot solar cells: a review

“…13), by which method the PCE of CdSe x Te 1−x QDSSCs was increased to 9.28% (certified PCE of 9.01%). 116 They also investigated a series of metal oxyhydroxide coating on photoelectrode in QDSSCs and found that NbCl and ZrO 2 Cl 2 modification can improve the photovoltaic properties, especially the open-circuit voltage, and a best PCE of 9.73% was obtained for CdSe x Te 1−x QDSSCs. 117 Very recently, an impressive PCE of 11.6% was reported for Zn-Cu-In-Se QDSSCs with the ZnS∕SiO 2 surface passivation, which is the best certified efficiency of QDSSCs up until now.…”

Graphitic porous carbon derived from human hair as ‘green’ counter electrode in quantum dot sensitized solar cells

“…Over the past few years PCE of quantum dot sensitized solar cells (QDSCs) has registered a remarkable improvement from a dismal <1% to an impressive >9%; thereby making them very promising candidates for third generation photovoltaics [1][2][3][4][5]. QDSCs offer an edge over those of dye sensitized solar cells (DSSCs) and bulk heterojunction polymer solar cells in terms of the QD's tuneable band-gap, high molar extinction coefficient, rapid charge separation and multiple exciton generation possibilities [6][7][8][9][10].…”

“…QDSCs offer an edge over those of dye sensitized solar cells (DSSCs) and bulk heterojunction polymer solar cells in terms of the QD's tuneable band-gap, high molar extinction coefficient, rapid charge separation and multiple exciton generation possibilities [6][7][8][9][10]. Although promising QDSCs are yet to cross the benchmark 10% PCE for commercialization prospects and most of the current research is focussed on development of high performance photoanodes [5,11,12]. However, the catalytic CE or the cathode also constitutes a critical component of the overall device.…”

Ultrathin ALD coating on TiO2 photoanodes with enhanced quantum dot loading and charge collection in quantum dots sensitized solar cells

“…Among these materials, TiO2 has been extensively applied to the photoanodes of QDSCs, owing to its excellent chemical stability [9], high charge mobility [10] and suitable band-structure [11]. However, TiO2 nanostructure still contains lots of surface defects that lead to a side reaction-charge recombination [12], which reduces the power conversion efficiency (PCE) of QDSCs based on TiO2 photoanodes.…”