## Temperature-dependent spectral mismatch corrections

## Abstract

This study develops the mathematical foundation for a translation of solar cell short-circuit current from one thermal and spectral irradiance operating condition to another without the use of ill-defined and error-prone temperature coefficients typically employed in solar cell metrology. Using the partial derivative of quantum efficiency with respect to temperature, the conventional isothermal expression for spectral mismatch corrections is modified to account for changes of current due to temperature; this modification completely eliminates the need for short-circuit-current temperature coefficients. An example calculation is provided to demonstrate use of the new translation.

- Authors:

- National Renewable Energy Lab. (NREL), Golden, CO (United States)

- Publication Date:

- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)

- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)

- OSTI Identifier:
- 1235229

- Report Number(s):
- NREL/JA-5J00-64369

Journal ID: ISSN 2156-3381

- Grant/Contract Number:
- AC36-08GO28308

- Resource Type:
- Accepted Manuscript

- Journal Name:
- IEEE Journal of Photovoltaics

- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 6; Journal ID: ISSN 2156-3381

- Publisher:
- IEEE

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; photovoltaic cells; photovoltaic modules; solar cells; characterizations; metrology; measurement; short circuit current (ISC); temperature coefficients; spectral irradiance

### Citation Formats

```
Osterwald, Carl R., Campanelli, Mark, Moriarty, Tom, Emery, Keith A., and Williams, Rafell. Temperature-dependent spectral mismatch corrections. United States: N. p., 2015.
Web. doi:10.1109/JPHOTOV.2015.2459914.
```

```
Osterwald, Carl R., Campanelli, Mark, Moriarty, Tom, Emery, Keith A., & Williams, Rafell. Temperature-dependent spectral mismatch corrections. United States. doi:10.1109/JPHOTOV.2015.2459914.
```

```
Osterwald, Carl R., Campanelli, Mark, Moriarty, Tom, Emery, Keith A., and Williams, Rafell. Sun .
"Temperature-dependent spectral mismatch corrections". United States. doi:10.1109/JPHOTOV.2015.2459914. https://www.osti.gov/servlets/purl/1235229.
```

```
@article{osti_1235229,
```

title = {Temperature-dependent spectral mismatch corrections},

author = {Osterwald, Carl R. and Campanelli, Mark and Moriarty, Tom and Emery, Keith A. and Williams, Rafell},

abstractNote = {This study develops the mathematical foundation for a translation of solar cell short-circuit current from one thermal and spectral irradiance operating condition to another without the use of ill-defined and error-prone temperature coefficients typically employed in solar cell metrology. Using the partial derivative of quantum efficiency with respect to temperature, the conventional isothermal expression for spectral mismatch corrections is modified to account for changes of current due to temperature; this modification completely eliminates the need for short-circuit-current temperature coefficients. An example calculation is provided to demonstrate use of the new translation.},

doi = {10.1109/JPHOTOV.2015.2459914},

journal = {IEEE Journal of Photovoltaics},

number = 6,

volume = 5,

place = {United States},

year = {2015},

month = {11}

}

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Cited by: 3 works

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