Dean H. Levi
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View article: Process for producing cadmium sulfide on a cadmium telluride surface
Process for producing cadmium sulfide on a cadmium telluride surface Open
A process for producing a layer of cadmium sulfide on a cadmium telluride surface to be employed in a photovoltaic device. The process comprises providing a cadmium telluride surface which is exposed to a hydrogen sulfide plasma at an expo…
View article: Solar cell efficiency tables (version 54)
Solar cell efficiency tables (version 54) Open
Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined, and new entries since Janua…
View article: Solar cell efficiency tables (version 52)
Solar cell efficiency tables (version 52) Open
Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined and new entries since Januar…
View article: Solar cell efficiency tables (version 51)
Solar cell efficiency tables (version 51) Open
Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined and new entries since July 2…
View article: Metastable defect response in CZTSSe from admittance spectroscopy
Metastable defect response in CZTSSe from admittance spectroscopy Open
Admittance spectroscopy is a useful tool used to study defects in semiconductor materials. However, metastable defect responses in non-ideal semiconductors can greatly impact the measurement and therefore the interpretation of results. Her…
View article: Improvements in world-wide intercomparison of PV module calibration
Improvements in world-wide intercomparison of PV module calibration Open
The calibration of the electrical performance of seven photovoltaic (PV) modules was compared between four reference laboratories on three continents. The devices included two samples in standard and two in high-efficiency crystalline sili…
View article: Solar cell efficiency tables (version 50)
Solar cell efficiency tables (version 50) Open
Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined, and new entries since Janua…
View article: Self-reference procedure to reduce uncertainty in module calibration
Self-reference procedure to reduce uncertainty in module calibration Open
This paper presents a composite measurement approach that capitalizes on complimentary strengths of 3 different test beds to significantly reduce uncertainty in I- V parameters for secondary module calibration. This approach addresses PV m…
View article: Solar cell efficiency tables (version 49)
Solar cell efficiency tables (version 49) Open
Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined, and new entries since June …
View article: Beneficial effect of post-deposition treatment in high-efficiency Cu(In,Ga)Se2 solar cells through reduced potential fluctuations
Beneficial effect of post-deposition treatment in high-efficiency Cu(In,Ga)Se2 solar cells through reduced potential fluctuations Open
World-record power conversion efficiencies for Cu(In,Ga)Se2 (CIGS) solar cells have been achieved via a post-deposition treatment with alkaline metals, which increases the open-circuit voltage and fill factor. We explore the role of the po…
View article: Locating the electrical junctions in Cu(In,Ga)Se<sub>2</sub> and Cu<sub>2</sub>ZnSnSe<sub>4</sub> solar cells by scanning capacitance spectroscopy
Locating the electrical junctions in Cu(In,Ga)Se<sub>2</sub> and Cu<sub>2</sub>ZnSnSe<sub>4</sub> solar cells by scanning capacitance spectroscopy Open
We determined the electrical junction (EJ) locations in Cu(In,Ga)Se 2 (CIGS) and Cu 2 ZnSnSe 4 (CZTS) solar cells with ~20‐nm accuracy by developing scanning capacitance spectroscopy (SCS) applicable to the thin‐film devices. Cross‐section…
View article: Superresolved multiphoton microscopy with spatial frequency-modulated imaging
Superresolved multiphoton microscopy with spatial frequency-modulated imaging Open
Significance Superresolution microscopy is indispensable in biological sciences. The vast majority of superresolution imaging techniques exploit real energetic states of fluorescent molecules to break the diffraction limit. To date, superr…