Efficient inorganic solar cells from aqueous nanocrystals: the impact of composition on carrier dynamics

RSC Advances ◽  
2015 ◽  
Vol 5 (91) ◽  
pp. 74263-74269 ◽  
Author(s):  
Zhaolai Chen ◽  
Qingsen Zeng ◽  
Fangyuan Liu ◽  
Gan Jin ◽  
Xiaohang Du ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Carrier Dynamics ◽  
Thin Film Solar Cells ◽  
Charge Dynamics ◽  
Cdte Nanocrystals ◽  
The Impact

Efficient inorganic thin-film solar cells are fabricated from aqueous CdTe nanocrystals and a power conversion efficiency of 5.73% is achieved. Annealing-induced variation of material composition and charge dynamics are investigated in detail.

scholarly journals Highly Reflective Dielectric Back Reflector for Improved Efficiency of Tandem Thin-Film Solar Cells

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Chog Barugkin ◽  
Ulrich W. Paetzold ◽  
Kylie R. Catchpole ◽  
Angelika Basch ◽  
Reinhard Carius
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Crystalline Silicon ◽  
Power Conversion ◽  
Thin Film Solar Cells ◽  
Average Reflectance ◽  
Back Reflector ◽  
Ag Reflector

We report on the prototyping and development of a highly reflective dielectric back reflector for application in thin-film solar cells. The back reflector is fabricated by Snow Globe Coating (SGC), an innovative, simple, and cheap process to deposit a uniform layer of TiO2particles which shows remarkably high reflectance over a broad spectrum (average reflectance of 99% from 500 nm to 1100 nm). We apply the highly reflective back reflector to tandem thin-film silicon solar cells and compare its performance with conventional ZnO:Al/Ag reflector. By using SGC back reflector, an enhancement of 0.5 mA/cm2in external quantum efficiency of the bottom solar cell and an absolute value of 0.2% enhancement in overall power conversion efficiency are achieved. We also show that the increase in power conversion efficiency is due to the reduction of parasitic absorption at the back contact; that is, the use of the dielectric reflector avoids plasmonic losses at the reference ZnO:Al/Ag back reflector. The Snow Globe Coating process is compatible with other types of solar cells such as crystalline silicon, III–V, and organic photovoltaics. Due to its cost effectiveness, stability, and excellent reflectivity above a wavelength of 400 nm, it has high potential to be applied in industry.

scholarly journals First-principles calculation on electronic properties of Bismuth-halide inorganic perovskites for solar cell

2021 ◽  
Vol 01 (01) ◽  
pp. 56-57
Author(s):  
Galhenage A. Sewvandi ◽  
◽  
J.T.S.T. Jayawardane ◽  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Photovoltaic Effect ◽  
Power Conversion ◽  
Thin Film Solar Cells ◽  
Halide Perovskite ◽  
Lead Halide

Solar energy is a commonly used alternate source of energy and it can be utilized based on the principle of the photovoltaic effect. The photovoltaic effect converts sun energy into electrical energy using photovoltaic devices (solar cells). A solar cell device should have high efficiency and a long lifetime to be commercially beneficial. Presently, silicon and thin-film solar cells are widely employed. The crystalline solar cells are more efficient but they are also expensive. Thin-film solar cells are formed by placing one or more thin layers of photovoltaic materials on different substrates. Although these cells have a lower cost, they are also less efficient compared to Si-based solar cells. Organic-inorganic hybrid lead halide perovskite solar cells are one of the most promising low-cost power conversion efficiency technologies that could exceed the 26% threshold. However, the lack of environmental stability and of high lead toxicity are the main bottlenecks that impede the future industrialization and commercialization hybrid lead halide perovskite. Hence It is important to achieve high power conversion efficiency while also maintaining stability and non-toxicity in the development of new lead-free perovskite materials.

scholarly journals Perovskite Thin Film Solar Cells Based on Inorganic Hole Conducting Materials

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Pan-Pan Zhang ◽  
Zheng-Ji Zhou ◽  
Dong-Xing Kou ◽  
Si-Xin Wu
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Visible Region ◽  
Hole Transport ◽  
Thin Film Solar Cells ◽  
Photoelectric Properties

Organic-inorganic metal halide perovskites have recently shown great potential for application, due to their advantages of low-cost, excellent photoelectric properties and high power conversion efficiency. Perovskite-based thin film solar cells have achieved a power conversion efficiency (PCE) of up to 20%. Hole transport materials (HTMs) are one of the most important components of perovskite solar cells (PSCs), having functions of optimizing interface, adjusting the energy match, and helping to obtain higher PCE. Inorganic p-type semiconductors are alternative HTMs due to their chemical stability, higher mobility, high transparency in the visible region, and applicable valence band (VB) energy level. This review analyzed the advantages, disadvantages, and development prospects of several popular inorganic HTMs in PSCs.

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