Performance analysis of field exposed single crystalline silicon modules

Sastry, O.S.; Saurabh, Sriparn; Shil, Sujit Kumer; Pant, P.C.; Kumar, Rajesh; Kumar, Arun; Bandopadhyay, Bibek

doi:10.1016/j.solmat.2010.03.035

Cited by 79 publications

(24 citation statements)

References 2 publications

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“…For the crystalline silicon solar cells this is a very limited body of information where the focus has been on extrinsic failure paths such as yellowing of the encapsulation materials or corrosion of the electrical connections. [4][5][6][7][8][9][10] For the thin film devices such as amorphous silicon (a-Si), cadmium telluride (CdTe) or copper indium gallium diseleneide (CIGS) there is more literature dedicated to degradation phenomena. Both detailed mechanistic studies, modeling and technological solutions have been reported for a-Si [11][12][13][14][15][16][17][18][19][20][21] and more phenomenological studies and elucidation of degradation mechanisms for CdTe [22][23][24][25][26][27][28] and CIGS [29][30][31][32][33][34][35][36][37][38][39][40][41] linked to back electrode diffusion and water ingress.…”

Section: The Solar Cells and Their Instabilitiesmentioning

confidence: 99%

Stability of Polymer Solar Cells

et al. 2011

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Organic photovoltaics (OPVs) evolve in an exponential manner in the two key areas of efficiency and stability. The power conversion efficiency (PCE) has in the last decade been increased by almost a factor of ten approaching 10%. A main concern has been the stability that was previously measured in minutes, but can now, in favorable circumstances, exceed many thousands of hours. This astonishing achievement is the subject of this article, which reviews the developments in stability/degradation of OPVs in the last five years. This progress has been gained by several developments, such as inverted device structures of the bulk heterojunction geometry device, which allows for more stable metal electrodes, the choice of more photostable active materials, the introduction of interfacial layers, and roll-to-roll fabrication, which promises fast and cheap production methods while creating its own challenges in terms of stability.

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Section: The Solar Cells and Their Instabilitiesmentioning

confidence: 99%

Stability of Polymer Solar Cells

et al. 2011

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“…Suleske et al [4] have investigated the degradation of modules installed in a gridtied power plant in Arizona, for 10-17 years, and has reported degradation rates ranging from 0.9%/year to 1.9%/ year for nonhot spot modules, while for modules with hot spots, the degradation rate was found to be as high as 5%/year. Sastry et al [5] have also reported that the degradation rates of crystalline silicon PV modules, monitored at their test bed at the National Institute of Solar Energy (NISE) in Gurgaon (near New Delhi) over a time of ten years, are more than the expected level [6]. Studies done by NISE on the performance analysis of different photovoltaic technologies (a-Si, multi c-Si and HIT) found that HIT and a-Si have performed better than multi c-Si [7,8].…”

Section: On the Mapmentioning

confidence: 99%

“…Sastry et al. have also reported that the degradation rates of crystalline silicon PV modules, monitored at their test bed at the National Institute of Solar Energy (NISE) in Gurgaon (near New Delhi) over a time of ten years, are more than the expected level . Studies done by NISE on the performance analysis of different photovoltaic technologies (a‐Si, multi c‐Si and HIT) found that HIT and a‐Si have performed better than multi c‐Si .…”

Section: Introductionmentioning

confidence: 99%

Comprehensive study of performance degradation of field‐mounted photovoltaic modules in India

Dubey

Chattopadhyay

Kuthanazhi

et al. 2017

Energy Science & Engineering

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The All India Survey of Photovoltaic Module Reliability 2014 is an enhanced version of the survey conducted in the previous year, with detailed characterization of PV modules including current-voltage, infrared and electroluminescence imaging, visual inspection, insulation resistance test and interconnect breakage test. More than a thousand modules were inspected in the field and the main results of the survey are presented in this paper. The average P max degradation rate for the so-called 'good' modules (Group X) is 1.33%/year which is higher than that commonly projected by manufacturers, and widely employed in financial calculations. Modules falling in the 'not-so-good' category (Group Y) show even higher degradation rates, and it is at least partly due to higher number of micro-cracks in the modules, and increased degradation of the packaging materials like encapsulant, backsheet, etc. Modules in 'Hot' climates degrade faster than modules in the 'Non-Hot' climates. Degradation in fill factor is the primary cause for performance degradation in the young modules (ages <5 years), whereas short-circuit current degradation is the main contributor to power degradation in the older modules. Small installations (<100 kW p capacity) show higher degradation than large systems, which may be partly due to lack of proper due diligence by the owner at the time of procurement and installation.

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“…Identification of photovoltaic (PV) module failures in the field is desirable to operate PV power plants at their maximum output. [1][2][3] Photovoltaic modules are often damaged when transported to the installation site 4 or during field installation, 5 and they also undergo degradation during their operation in the field. 6 For these reasons, it is important to monitor each module's performance.…”

Section: Introductionmentioning

confidence: 99%

Outdoor photoluminescence imaging of photovoltaic modules with sunlight excitation

Bhoopathy

Kunz

Juhl

et al. 2017

Progress in Photovoltaics

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To operate photovoltaic power plants at maximum capacity, it is desirable to identify cell or module failures in the field at the earliest possible stage. Currently used field inspection methods cannot detect many of the electronic defects that can be revealed with luminescence-based techniques. In this work, photoluminescence images are acquired using the sun as the sole illumination source by separating the weak luminescence signal from the much stronger ambient sunlight signal. This is done by using an appropriate choice of optical filtering and modulation of the cells' bias between the normal operating point and open circuit condition. The switching is achieved by periodically changing the optical generation rate of at least one cell within the module. This changes the biasing condition of all other cells that are connected to the same bypass diode. This method has the advantage that it can deliver high quality images revealing electrical defects in individual cells and entire modules, without requiring any changes to the electrical connections of the photovoltaic system.

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Performance analysis of field exposed single crystalline silicon modules

Cited by 79 publications

References 2 publications

Stability of Polymer Solar Cells

Stability of Polymer Solar Cells

Comprehensive study of performance degradation of field‐mounted photovoltaic modules in India

Outdoor photoluminescence imaging of photovoltaic modules with sunlight excitation

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