Improvement of minority carrier collection and quantum efficiency in graphene planar silicon solar cell

2017 ◽  
Vol 49 (4) ◽  
Author(s):  
Yawei Kuang ◽  
Yulong Ma ◽  
Jian Xu ◽  
Yushen Liu ◽  
Debao Zhang ◽  
...  
Keyword(s):  
Solar Cell ◽  
Quantum Efficiency ◽  
Silicon Solar Cell ◽  
Minority Carrier ◽  
Planar Silicon ◽  
Carrier Collection

scholarly journals Extracting Mobility-Lifetime Product in Solar Cell Absorbers Using Quantum Efficiency Analysis

2015 ◽  
Vol 1771 ◽  
pp. 139-144 ◽  
Author(s):  
Jeremy R. Poindexter ◽  
Riley E. Brandt ◽  
Niall M. Mangan ◽  
Tonio Buonassisi
Keyword(s):  
Solar Cell ◽  
Quantum Efficiency ◽  
Minority Carrier ◽  
Absorption Data ◽  
Multiple Parameters ◽  
Quantitative Measurements ◽  
Collection Probability ◽  
Carrier Collection ◽  
Minority Carrier Mobility ◽  
Analytic Models

ABSTRACTThe long-wavelength quantum efficiency (QE) response of photovoltaic absorbers is determined by the length scales for minority carrier collection. However, extracting quantitative measurements of minority carrier mobility-lifetime product (μτ) is complicated by uncertainty in other factors such as the depletion width, electric field, and the absorption coefficient. We apply previously developed methods to obtain estimates for μτ in a tin(II) sulfide (SnS) solar cell. We compare three analytic models for the minority carrier collection probability as a function of absorber depth to determine which model most accurately captures the behavior in our devices. For models in which multiple parameters are unconstrained, a random numerical search is used to optimize the fit to experimental QE for SnS. To identify sources of error, we perform a sensitivity analysis by fitting with SCAPS-1D. Our analysis shows that changes in absorption most strongly affect estimates for μτ, highlighting the need to obtain accurate, device-specific absorption data. Further modeling and experimental constraints are required to obtain self-consistent values for μτ that correspond to actual device performance.

Effects of Ga Compositional Grading on CIGS Electronic Properties Relevant to Solar Cell Performance

2009 ◽  
Vol 1165 ◽  
Author(s):  
JinWoo Lee ◽  
Jeroen K.J. van Duren ◽  
Alex Pudov ◽  
Miguel Contreras ◽  
David J. Cohen
Keyword(s):  
Solar Cell ◽  
Minority Carrier ◽  
Defect Density ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Free Hole ◽  
Deep Acceptor ◽  
Free Carrier Density ◽  
Carrier Collection ◽  
Compositional Grading

AbstractTransient photocurrent (TPI) and photocapacitance (TPC) spectroscopy have been applied to a set of compositional graded CuIn1-xGaxSe2 (CIGS) solar cell devices deposited by the vacuum co-evaporation method at the National Renewable Energy Laboratory. These measurements provide a spectral map of the optically induced release of carriers for photon energies from below 1 eV to 2 eV. By comparing the two types of spectra one can distinguish majority from minority carrier processes and they clearly reveal a higher degree of minority carrier collection for devices in which the Ga fraction increased monotonically with distance from the junction. This agrees with notions of how compositional grading improves overall cell performance. Minority carrier collection was even more strongly enhanced in sample devices incorporating v-shaped Ga-grading. Spatial profiles of the free hole carrier densities and deep acceptor concentrations were examined using drive-level capacitance profiling (DLCP). In the compositionally graded sample devices we found that the free carrier density decreased and that defect density increased with increasing Ga fraction toward back contact.

scholarly journals Influence of Temperature and Frequency on Minority Carrier Diffusion Coefficient in a Silicon Solar Cell under Magnetic Field

2019 ◽  
Vol 11 (10) ◽  
pp. 355-361
Author(s):  
Seydina Diouf ◽  
Mor Ndiaye ◽  
Ndeye Thiam ◽  
Youssou Traore ◽  
Mamadou Lamine Ba ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Diffusion Coefficient ◽  
Solar Cell ◽  
Silicon Solar Cell ◽  
Minority Carrier ◽  
Carrier Diffusion ◽  
Influence Of Temperature

Capitalizing on two dimensional minority carrier injection in silicon solar cell design

1996 ◽  
Vol 41-42 ◽  
pp. 183-193 ◽  
Author(s):  
C HONSBERG ◽  
S EDMISTON ◽  
L KOSCHIER ◽  
S WENHAM ◽  
A SPROUL ◽  
...  
Keyword(s):  
Solar Cell ◽  
Silicon Solar Cell ◽  
Minority Carrier ◽  
Cell Design ◽  
Two Dimensional ◽  
Carrier Injection

scholarly journals Studying of Perovskite Nanoparticles in PMMA Matrix Used As Light Converter for Silicon Solar Cell

2017 ◽  
Vol 62 (3) ◽  
pp. 1733-1739 ◽  
Author(s):  
M. Lipiński ◽  
R.P. Socha ◽  
A. Kędra ◽  
K. Gawlińska ◽  
G. Kulesza-Matlak ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Quantum Efficiency ◽  
Short Wavelength ◽  
Silicon Solar Cell ◽  
Antireflection Coating ◽  
Silicon Solar Cells ◽  
Pmma Layer ◽  
Pmma Matrix ◽  
Perovskite Nanoparticles

AbstractThe nanoparticles of CH3NH3PbBr3hybrid perovskites were synthesized. These perovskite nanoparticles we embedded in polymethyl methacrylate (PMMA) in order to obtain the composite, which we used as light converter for silicon solar cells. It was shown that the composite emit the light with the intensity maximum at about 527 nm when exited by a short wavelength (300÷450 nm) of light. The silicon solar cells were used to examine the effect of down-conversion (DC) process by perovskite nanoparticles embedded in PMMA. For experiments, two groups of monocrystalline silicon solar cells were used. The first one included the solar cells without surface texturization and antireflection coating. The second one included the commercial cells with surface texturization and antireflection coating. In every series of the cells one part of the cells were covered by composite (CH3NH3PbBr3in PMMA) layer and second part of cells by pure PMMA for comparison. It was shown that External Quantum Efficiency EQE of the photovoltaic cells covered by composite (CH3NH3PbBr3in PMMA) layer was improved in both group of the cells but unfortunately the Internal Quantum Efficiency was reduced. This reduction was caused by high absorption of the short wavelength light and reabsorption of the luminescence light. Therefore, the CH3NH3PbBr3perovskite nanoparticles embedded in PMMA matrix were unable to increase silicon solar cell efficiency in the tested systems.

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