A hybrid halobismuthate light-harvesting material with an optical band gap of 1.70 eV

2016 ◽  
Vol 40 (12) ◽  
pp. 10041-10047 ◽  
Author(s):  
Vitalii Yu. Kotov ◽  
Andrey B. Ilyukhin ◽  
Kirill P. Birin ◽  
Veronika K. Laurinavichyute ◽  
Alexey A. Sadovnikov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Band Gap ◽  
Optical Band Gap ◽  
Light Harvesting ◽  
Promising Material

The product of Br–I substitution in 1-D (C15H14N4)BiBr5·H2O can be proposed as a promising material for solid-state solar cells.

scholarly journals Polymer Thermal Treatment Production of Cerium Doped Willemite Nanoparticles: An Analysis of Structure, Energy Band Gap and Luminescence Properties

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1118
Author(s):  
Ibrahim Mustapha Alibe ◽  
Khamirul Amin Matori ◽  
Mohd Hafiz Mohd Zaid ◽  
Salisu Nasir ◽  
Ali Mustapha Alibe ◽  
...  
Keyword(s):  
Solid State ◽  
Thermal Treatment ◽  
Band Gap ◽  
Optical Band Gap ◽  
Dopant Concentration ◽  
Blue Emission ◽  
Green Emission ◽  
Band Gap Energy ◽  
Solid State Lighting ◽  
Gap Energy

The contemporary market needs for enhanced solid–state lighting devices has led to an increased demand for the production of willemite based phosphors using low-cost techniques. In this study, Ce3+ doped willemite nanoparticles were fabricated using polymer thermal treatment method. The special effects of the calcination temperatures and the dopant concentration on the structural and optical properties of the material were thoroughly studied. The XRD analysis of the samples treated at 900 °C revealed the development and or materialization of the willemite phase. The increase in the dopant concentration causes an expansion of the lattice owing to the replacement of larger Ce3+ ions for smaller Zn2+ ions. Based on the FESEM and TEM micrographs, the nanoparticles size increases with the increase in the cerium ions. The mean particles sizes were estimated to be 23.61 nm at 1 mol% to 34.02 nm at 5 mol% of the cerium dopant. The optical band gap energy of the doped samples formed at 900 °C decreased precisely by 0.21 eV (i.e., 5.21 to 5.00 eV). The PL analysis of the doped samples exhibits a strong emission at 400 nm which is ascribed to the transition of an electron from localized Ce2f state to the valence band of O2p. The energy level of the Ce3+ ions affects the willemite crystal lattice, thus causing a decrease in the intensity of the green emission at 530 nm and the blue emission at 485 nm. The wide optical band gap energy of the willemite produced is expected to pave the way for exciting innovations in solid–state lighting applications.

Research on Nanocrystalline Silicon Film Solar Cells

2011 ◽  
Vol 347-353 ◽  
pp. 870-873
Author(s):  
Chun Rong Xue
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Band Gap ◽  
Optical Band Gap ◽  
Volume Fraction ◽  
Silicon Film ◽  
Nanocrystalline Silicon ◽  
Processing Parameters ◽  
Crystalline Volume Fraction ◽  
Hydrogen Dilution

Nanocrystalline silicon film has become the research hit of today’ s P-V solar technology. It’s optical band gap was controlled through changing the grain size and crystalline volume fraction for the quanta dimension effect. The crystalline volume fraction in nc-Si:H is modulated by varying the hydrogen concentration in the silane plasma. Also, the crystallinity of the material increases with increasing hydrogen dilution ratio, the band tail energy width of the nc-Si:H concurrently decreases. Two sets of nc-Si:H solar cells were made with different layer thicknesss, their electronic and photonic bandgap, absorption coefficient, optical band gap, nanocrystalline grain size(D), and etc have been stuied. In addition, we discussed the relationship between the stress of nc-Si thin films and H2 ratio. At last nc-Si:H solar cells have been designed and prepared successfully in the optimized processing parameters.

Band-gap-graded Cu2ZnSn(S,Se)4 drives high efficient solar cells

2022 ◽  
Author(s):  
Hongling Guo ◽  
Rutao Meng ◽  
Gang Wang ◽  
Shenghao Wang ◽  
Li Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Light Harvesting ◽  
Absorber Layer ◽  
Photovoltaic Application ◽  
High Efficient

Fabrication of high efficient solar cells is critical for photovoltaic application. The bandgap-graded absorber layer can not only drive carriers efficient collection but also improve the light harvesting. However, it...

scholarly journals EDOT–diketopyrrolopyrrole copolymers for polymer solar cells

2016 ◽  
Vol 4 (9) ◽  
pp. 3477-3486 ◽  
Author(s):  
Chao Wang ◽  
Christian J. Mueller ◽  
Eliot Gann ◽  
Amelia C. Y. Liu ◽  
Mukundan Thelakkat ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Optical Band Gap ◽  
Polymer Solar Cells ◽  
Photovoltaic Properties

The photovoltaic properties of a series of EDOT-containing DPP polymers with optical band gap as low as 1.13 eV are reported.

Wavelength-dependent optical transition mechanisms for light-harvesting of perovskite MAPbI3 solar cells using first-principles calculations

2016 ◽  
Vol 4 (23) ◽  
pp. 5248-5254 ◽  
Author(s):  
Hsin-An Chen ◽  
Ming-Hsien Lee ◽  
Chun-Wei Chen
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
High Power ◽  
First Principles ◽  
Light Harvesting ◽  
Optical Transition ◽  
Power Conversion ◽  
First Principles Calculations ◽  
Inorganic Perovskite ◽  
Conversion Efficiencies

The recently emerging class of solid-state hybrid organic–inorganic perovskite-based solar cells has demonstrated remarkably high power conversion efficiencies of up to ∼20%.

TiO2nanoparticulate-wire hybrids for highly efficient solid-state dye-sensitized solar cells using SSP-PEDOTs

RSC Advances ◽  
2014 ◽  
Vol 4 (84) ◽  
pp. 44555-44562 ◽  
Author(s):  
Jongbeom Na ◽  
Jeonghun Kim ◽  
Chihyun Park ◽  
Eunkyoung Kim
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Light Harvesting ◽  
Collection Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Charge Collection ◽  
Charge Collection Efficiency ◽  
Dye Sensitized ◽  
Highly Efficient ◽  
Sensitized Solar Cells

TiO2photoanodes for I2-free solid-state dye-sensitized solar cells (ssDSSCs) were prepared from multifunctional new TiO2nanostructures to enhance light harvesting and charge collection efficiency in ssDSSCs using poly(3,4-ethylenedioxythiophene)s (PEDOTs).

Impact of Molecular Charge-Transfer States on Photocurrent Generation in Solid State Dye-Sensitized Solar Cells Employing Low-Band-Gap Dyes

2014 ◽  
Vol 118 (30) ◽  
pp. 16825-16830 ◽  
Author(s):  
Sai Santosh Kumar Raavi ◽  
Pablo Docampo ◽  
Christian Wehrenfennig ◽  
Marcelo J. P. Alcocer ◽  
Golnaz Sadoughi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Solid State ◽  
Band Gap ◽  
Dye Sensitized Solar Cells ◽  
Low Band Gap ◽  
Dye Sensitized ◽  
Photocurrent Generation ◽  
Molecular Charge ◽  
Sensitized Solar Cells
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