Hot spots spontaneously emerging in thin film photovoltaics

@article{Vasko2013HotSS,
  title={Hot spots spontaneously emerging in thin film photovoltaics},
  author={Anthony Vasko and Aarohi Vijh and Victor G. Karpov},
  journal={arXiv: Disordered Systems and Neural Networks},
  year={2013}
}
  • A. Vasko, A. Vijh, V. Karpov
  • Published 30 December 2013
  • Materials Science, Physics, Mathematics
  • arXiv: Disordered Systems and Neural Networks
We present data exhibiting hot spots spontaneously emerging in forward biased thin film photovoltaics based on a-Si:H technology. These spots evolve over time shrinking in their diameter and increasing temperature up to approximately 300 $^o$C above that of the surrounding area. Our numerical approach explores a system of many identical diodes in parallel connected through the resistive electrode and through thermal connectors, a model which couples electric and thermal processes. The modeling… 
Modeling of temperature profile, thermal runaway and hot spot in thin film solar cells
Abstract Hot spot and thermal runaway are serious phenomena leading to the degradation of CdTe thin film solar cells. Here, we show that these issues are well related to temperature variation in the
Shading-induced failure in thin-film photovoltaic modules: Electrothermal simulation with nonuniformities
Abstract Finite element electrothermal modeling is employed to study shading-induced failure in monolithically integrated thin-film photovoltaic modules. A key element is spatial nonuniformity in
Thermal instabilities of charge carrier transport in solar cells based on GaAs PN Junctions
Thesis to opt for Master degree in Engineering Sciences, Mechanical Mention, and Memory for the title of Mechanical Civil Engineering. AUTHOR: Josefa Fernanda Ibaceta Jaña. DATE: April 21, 2017
A numerical model of nonuniform solar cell stability
We model degradation in extended two-dimensional solar cells. The model couples electrical and thermal physics, so that voltage and temperature can vary over a device. Degradation is modeled
Thermoelectric feedback model of photovoltaic panels hot spots
LT-spice model of single photo-voltaic cell with feedback between photocurrent and temperature, determined by dissipated power in the cell is proposed. Thermal effects are studied in cells with small
Finite element modeling for analysis of electroluminescence and infrared images of thin-film solar cells
Abstract Sheet resistance losses and local defects are challenges faced in solar module fabrication and upscaling processes. Commonly used investigation tools are non-invasive optical and thermal
Numerical investigation of coupled optical-electrical-thermal processes for plasmonic solar cells at various angles of incident irradiance
Abstract Plasmonic solar cells include metal nanoparticles deposited on the top surface of substrate, whose output performance is constrained by self-heating, light induced heating, and environmental
Experimental observations on hot-spots and derived acceptance/rejection criteria
TLDR
The IES–UPM observations on 200 affected photovoltaic modules are presented, as well as electroluminescence, peak power rating and operating voltage tests have been carried out, and hot-spots temperature gradients larger than 20 °C are proposed as rejecting conditions for routine inspections under contractual frameworks.
HOT-SPOT PHENOMENON IN PV SYSTEMS WITH OVERHEAD LINES PARTIAL SHADING
This paper deals with the occurrence of hot-spot phenomenon in photovoltaic systems under PV partial shadowing. In an experimental campaign, the hot-spot phenomenon was revealed on a PV installation
A Review for Solar Panel Fire Accident Prevention in Large-Scale PV Applications
TLDR
Based on the review, some precautions to prevent solar panel related fire accidents in large-scale solar PV plants that are located adjacent to residential and commercial areas are outlined.
...
1
2
...

References

SHOWING 1-10 OF 18 REFERENCES
Hot spot runaway in thin film photovoltaics and related structures
We show that thin film diode structures, such as photovoltaics and light emitting arrays, can undergo zero threshold localized thermal runaway leading to thermal and electrical nonuniformities
Coupled electron-heat transport in nonuniform thin film semiconductor structures
A theory of transverse electron transport coupled with heat transfer in semiconductor thin films is developed conceptually modeling structures of modern electronics. The transverse currents generate
Random diode arrays and mesoscale physics of large-area semiconductor devices
Large-area, thin-film semiconductor devices often exhibit strong fluctuations in electronic properties on a mesoscale level that originate from relatively weak microscopic fluctuations in material
Understanding and mitigating effects of nonuniformities on reliability of thin film photovoltaics
  • V. Karpov, D. Shvydka
  • Materials Science, Engineering
    Optics + Photonics for Sustainable Energy
  • 2009
Thin-film photovoltaics (PV) are sensitive to lateral nonuniformities (LN) that manifest themselves in spatial variations of the device local characteristics and in the variability of the measured
Electrothermal Finite-Element Modeling for Defect Characterization in Thin-Film Silicon Solar Modules
We present and validate a finite-element model for coupled charge and heat transport in monolithically interconnected thin-film solar modules. Using measured current-voltage ( I-V) and lock-in
Shunt screening, size effects and I /V analysis in thin-film photovoltaics
We present an analytical model that quantitatively describes the physics behind shunting in thin film photovoltaics and predicts size-dependent effects in the I/V characteristics of solar cells. The
Photoeffects in Nonuniformly Irradiated p‐n Junctions
A theoretical basis is provided for the interpretation of photoeffects observed in nonuniformly irradiated p‐n junctions. Differential equations describing the junction photovoltage are developed
Model-based method for partially shaded PV modules Hot Spot Suppression
Hot Spot Suppression is a new method to operate a PV module that prevents the formation of hot spots without the need for bypass diodes. By comparing the operating voltage, current and temperature to
Spatially-resolved modelling of dust effect on cadmium telluride photovoltaic modules
Abstract A spatially-resolved 3 dimensional model is developed utilising the circuit analysis software PSPICE to investigate the effect of inhomogeneously deposited dust on the performance of
A Dynamic Photovoltaic Model Incorporating Capacitive and Reverse-Bias Characteristics
TLDR
A comprehensive mathematical PV model based on circuit components that accounts for forward bias, reverse bias, and dynamic characteristics is developed and implemented in MATLAB Simulink and accurately models the measured data.
...
1
2
...