Hot spotting and second breakdown effects on reverse I-V characteristics for mono-crystalline Si Photovoltaics

Katherine A. Kim, Philip T Krein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Hot spots are a common problem in photovoltaic (PV) panels that accelerate cell degradation and reduce system performance. Hot spots occur when a cell is reversed biased, sinks power, and heats the cell. At a certain threshold, the PV p-n junction goes into second breakdown and heats a small portion of the cell to very high temperatures. This study experimentally tests mono-crystalline Si cells as they hot spot at different power levels. Heating effects on the I-V characteristics during hot spotting and permanent changes after seven days of hour-long hot spot tests are observed and analyzed. I-V characteristics are significantly affected under second breakdown, which is observed when cells are reverse-biased above two times the rated maximum power level.

Original languageEnglish (US)
Title of host publication2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013
Pages1007-1014
Number of pages8
DOIs
StatePublished - Dec 31 2013
Event5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013 - Denver, CO, United States
Duration: Sep 15 2013Sep 19 2013

Publication series

Name2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013

Other

Other5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013
CountryUnited States
CityDenver, CO
Period9/15/139/19/13

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

Fingerprint Dive into the research topics of 'Hot spotting and second breakdown effects on reverse I-V characteristics for mono-crystalline Si Photovoltaics'. Together they form a unique fingerprint.

  • Cite this

    Kim, K. A., & Krein, P. T. (2013). Hot spotting and second breakdown effects on reverse I-V characteristics for mono-crystalline Si Photovoltaics. In 2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013 (pp. 1007-1014). [6646813] (2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013). https://doi.org/10.1109/ECCE.2013.6646813