Improved photovoltaic performance of solar cells co-sensitized with graphitic C3N4 and CdS quantum dots

The hydrogenated TiO2porous nanocrystalline film is modified with CdS quantum dots by successive ionic layer adsorption and reaction (SILAR) method to prepare the cosensitized TiO2solar cells by CdS quantum dots and hydrogenation. The structure and topography of the composite photoanode film were confirmed by X-ray diffraction and scanning electron microscopy. With deposited CdS nanoparticles, UV absorption spectra of H:TiO2photoanode film indicated a considerably enhanced absorption in the visible region. The cosensitized TiO2solar cell by CdS quantum dots and hydrogenation presents much better photovoltaic properties than either CdS sensitized TiO2solar cells or hydrogenated TiO2solar cells, which displays enhanced photovoltaic performance with power conversion efficiency (η) of 1.99% (Jsc=6.26 mA cm−2,Voc=0.65 V, and FF = 0.49) under full one-sun illumination. The reason for the enhanced photovoltaic performance of the novel cosensitized solar cell is primarily explained by studying the Nyquist spectrums, IPCE spectra, dark current, and photovoltaic performances.

Download Full-text

The role of graphitic C3N4 in improving the photovoltaic performance of CdS quantum dots sensitized solar cells

Inorganic Chemistry Communications ◽

10.1016/j.inoche.2021.108919 ◽

2021 ◽

Vol 133 ◽

pp. 108919

Author(s):

Wei Zheng ◽

Shuyi Zhang

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Photovoltaic Performance ◽

Cds Quantum Dots ◽

Sensitized Solar Cells

Download Full-text

Effects of interface modification with self-assembled monolayers on the photovoltaic performance of CdS quantum dots sensitized solar cells

Electrochimica Acta ◽

10.1016/j.electacta.2015.02.190 ◽

2015 ◽

Vol 164 ◽

pp. 38-47 ◽

Cited By ~ 4

Author(s):

Lili Yang ◽

Gang Chen ◽

Yunfei Sun ◽

Donglai Han ◽

Shuo Yang ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Photovoltaic Performance ◽

Self Assembled Monolayers ◽

Cds Quantum Dots ◽

Interface Modification ◽

Assembled Monolayers ◽

Self Assembled ◽

Sensitized Solar Cells

Download Full-text

Effects of CsSnxPb1−xI3 Quantum Dots as Interfacial Layer on Photovoltaic Performance of Carbon-Based Perovskite Solar Cells

Nanoscale Research Letters ◽

10.1186/s11671-021-03533-y ◽

2021 ◽

Vol 16 (1) ◽

Author(s):

Chi Zhang ◽

Zhiyuan He ◽

Xuanhui Luo ◽

Rangwei Meng ◽

Mengwei Chen ◽

...

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

Photovoltaic Performance ◽

Perovskite Solar Cells ◽

Photogenerated Electron ◽

Depletion Region ◽

Band Alignment ◽

Back Surface ◽

The One ◽

Carbon Based

AbstractIn this work, inorganic tin-doped perovskite quantum dots (PQDs) are incorporated into carbon-based perovskite solar cells (PSCs) to improve their photovoltaic performance. On the one hand, by controlling the content of Sn2+ doping, the energy level of the tin-doped PQDs can be adjusted, to realize optimized band alignment and enhanced separation of photogenerated electron–hole pairs. On the other hand, the incorporation of tin-doped PQDs provided with a relatively high acceptor concentration due to the self-p-type doping effect is able to reduce the width of the depletion region near the back surface of the perovskite, thereby enhancing the hole extraction. Particularly, after the addition of CsSn0.2Pb0.8I3 quantum dots (QDs), improvement of the power conversion efficiency (PCE) from 12.80 to 14.22% can be obtained, in comparison with the pristine device. Moreover, the experimental results are analyzed through the simulation of the one-dimensional perovskite/tin-doped PQDs heterojunction.

Download Full-text