Temperature-Dependent Light-Stabilized States in Thin-Film PV Modules

Michael Deceglie; Timothy Silverman; William Marion; Sarah Kurtz

doi:10.1109/PVSC.2015.7355854

Temperature-Dependent Light-Stabilized States in Thin-Film PV Modules

Materials Science

Research output: Contribution to conference › Paper › peer-review

3 Scopus Citations

Abstract

Thin-film photovoltaic modules are known to exhibit light-induced transient behavior which interferes with accurate and repeatable measurements of power. Typically power measurements are made after a light exposure in order to target a light state of the module that is representative of outdoor performance. Here we show that the concept of a unique light state is poorly defined for both CIGS and CdTe modules. Instead we find that their metastable state after a light exposure can depend on the temperature of the module during the exposure. We observe changes in power as large as 5.8% for a 20°C difference in light exposure temperature. These results lead us to conclude that for applications in which reproducibility and repeatability are critical, module temperature should be tightly controlled during light exposure.

Original language	American English
Number of pages	3
DOIs	https://doi.org/10.1109/PVSC.2015.7355854 https://doi.org/10.1109/PVSC.2015.7355854
State	Published - 14 Dec 2015
Event	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States Duration: 14 Jun 2015 → 19 Jun 2015

Conference

Conference	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country/Territory	United States
City	New Orleans
Period	14/06/15 → 19/06/15

Bibliographical note

See NREL/CP-5J00-64417 for preprint

NLR Publication Number

NREL/CP-5J00-66356

Keywords

characterization
light soak
measurement
Metastability
photovoltaic
solar
thin film
transient

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Cite this

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title = "Temperature-Dependent Light-Stabilized States in Thin-Film PV Modules",

abstract = "Thin-film photovoltaic modules are known to exhibit light-induced transient behavior which interferes with accurate and repeatable measurements of power. Typically power measurements are made after a light exposure in order to target a light state of the module that is representative of outdoor performance. Here we show that the concept of a unique light state is poorly defined for both CIGS and CdTe modules. Instead we find that their metastable state after a light exposure can depend on the temperature of the module during the exposure. We observe changes in power as large as 5.8\% for a 20°C difference in light exposure temperature. These results lead us to conclude that for applications in which reproducibility and repeatability are critical, module temperature should be tightly controlled during light exposure.",

keywords = "characterization, light soak, measurement, Metastability, photovoltaic, solar, thin film, transient",

author = "Michael Deceglie and Timothy Silverman and William Marion and Sarah Kurtz",

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T1 - Temperature-Dependent Light-Stabilized States in Thin-Film PV Modules

AU - Deceglie, Michael

AU - Silverman, Timothy

AU - Marion, William

AU - Kurtz, Sarah

N1 - See NREL/CP-5J00-64417 for preprint

PY - 2015/12/14

Y1 - 2015/12/14

N2 - Thin-film photovoltaic modules are known to exhibit light-induced transient behavior which interferes with accurate and repeatable measurements of power. Typically power measurements are made after a light exposure in order to target a light state of the module that is representative of outdoor performance. Here we show that the concept of a unique light state is poorly defined for both CIGS and CdTe modules. Instead we find that their metastable state after a light exposure can depend on the temperature of the module during the exposure. We observe changes in power as large as 5.8% for a 20°C difference in light exposure temperature. These results lead us to conclude that for applications in which reproducibility and repeatability are critical, module temperature should be tightly controlled during light exposure.

AB - Thin-film photovoltaic modules are known to exhibit light-induced transient behavior which interferes with accurate and repeatable measurements of power. Typically power measurements are made after a light exposure in order to target a light state of the module that is representative of outdoor performance. Here we show that the concept of a unique light state is poorly defined for both CIGS and CdTe modules. Instead we find that their metastable state after a light exposure can depend on the temperature of the module during the exposure. We observe changes in power as large as 5.8% for a 20°C difference in light exposure temperature. These results lead us to conclude that for applications in which reproducibility and repeatability are critical, module temperature should be tightly controlled during light exposure.

KW - characterization

KW - light soak

KW - measurement

KW - Metastability

KW - photovoltaic

KW - solar

KW - thin film

KW - transient

UR - https://www.scopus.com/pages/publications/84961572445

U2 - 10.1109/PVSC.2015.7355854

DO - 10.1109/PVSC.2015.7355854

M3 - Paper

AN - SCOPUS:84961572445

T2 - 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015

Y2 - 14 June 2015 through 19 June 2015

ER -

Temperature-Dependent Light-Stabilized States in Thin-Film PV Modules

Abstract

Conference

Bibliographical note

NLR Publication Number

Keywords

Access to Document

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