Adam Danielson
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View article: Charge Carrier Lifetime Determination in Graded Absorber Solar Cells Using Time‐Resolved Photoluminescence Simulations and Measurements
Charge Carrier Lifetime Determination in Graded Absorber Solar Cells Using Time‐Resolved Photoluminescence Simulations and Measurements Open
Thin‐film photovoltaic device efficiencies are limited by carrier recombination, thus understanding recombination mechanisms is critical for performance improvements. Bulk minority carrier lifetime ( τ bulk ) is a critical parameter for so…
View article: A comprehensive material study of CdSeTe films deposited with differing selenium compositions
A comprehensive material study of CdSeTe films deposited with differing selenium compositions Open
View article: Microscopy Visualization of Carrier Transport in CdSeTe/CdTe Solar Cells
Microscopy Visualization of Carrier Transport in CdSeTe/CdTe Solar Cells Open
Solar cells are essentially minority carrier devices, and it is therefore of central importance to understand the pertinent carrier transport processes. Here, we advanced a transport imaging technique to directly visualize the charge motio…
View article: CdSexTe1-x /CdTe Devices With Reduced Interface Recombination Through Novel Back Contacts and Doping Strategies
CdSexTe1-x /CdTe Devices With Reduced Interface Recombination Through Novel Back Contacts and Doping Strategies Open
In order to study rear interface recombination in CdSexTe1-x/CdTe solar cells, several back contact structures were fabricated using combinations of tellurium, alumina, amorphous silicon, and indium tin oxide. Film side Time-Resolved Photo…
View article: Understanding the Role of CdTe in Polycrystalline CdSe<sub><i>x</i></sub>Te<sub>1–<i>x</i></sub>/CdTe‐Graded Bilayer Photovoltaic Devices
Understanding the Role of CdTe in Polycrystalline CdSe<sub><i>x</i></sub>Te<sub>1–<i>x</i></sub>/CdTe‐Graded Bilayer Photovoltaic Devices Open
Grading of bandgap by alloying CdTe with selenium to form a CdSe x Te 1– x /CdTe‐graded bilayer device has led to a device efficiency over 19%. A CdSe x Te 1– x absorber would increase the short‐circuit current due to its lower bandgap but…
View article: Robust passivation of CdSeTe based solar cells using reactively sputtered magnesium zinc oxide
Robust passivation of CdSeTe based solar cells using reactively sputtered magnesium zinc oxide Open
View article: Progress and Challenges in Absorber and Interface Fabrication of Polycrystalline CdTe Photovoltaics
Progress and Challenges in Absorber and Interface Fabrication of Polycrystalline CdTe Photovoltaics Open
Polycrystalline thin-film CdTe device efficiency of over 19% has been achieved at Colorado State University using a highly repeatable and scalable sublimation process. Record efficiency for research scale CdTe photovoltaics has been report…
View article: Arsenic Doping of Polycrystalline CdSeTe Devices for Microsecond Life-times with High Carrier Concentrations
Arsenic Doping of Polycrystalline CdSeTe Devices for Microsecond Life-times with High Carrier Concentrations Open
We report seminal advances in fabrication and understanding of group V (As) doped thin-film polycrystalline CdTe-based solar cells. The devices are fabricated using a novel approach, by sublimating layers of CdSeTe and CdSeTe:As. This new …
View article: Study of Arsenic Doped CdSeTe Solar Cells Using Transmission Electron Microscopy
Study of Arsenic Doped CdSeTe Solar Cells Using Transmission Electron Microscopy Open
CdTe-based solar cells have shown promising increase in efficiency in the past few years.Yet the record laboratory efficiencies of CdTe-based solar cells (~22%) are still well below their theoretical efficiency limit of 30%.[1]Relatively s…
View article: Microsecond Carrier Lifetimes in Polycrystalline CdSeTe Heterostructures and in CdSeTe Thin Film Solar Cells
Microsecond Carrier Lifetimes in Polycrystalline CdSeTe Heterostructures and in CdSeTe Thin Film Solar Cells Open
We report significant advances in understanding and reducing nonradiative Shockley-Read-Hall recombination in polycrystalline CdSexTe1-x, leading to microsecond charge carrier lifetimes. In undoped Al2O
View article: Doping CdSe<sub>x</sub>Te<sub>1-x</sub>/CdTe Graded Absorber Films with Arsenic for Thin-Film Photovoltaics
Doping CdSe<sub>x</sub>Te<sub>1-x</sub>/CdTe Graded Absorber Films with Arsenic for Thin-Film Photovoltaics Open
CdTe thin-film photovoltaics have demonstrated some of the lowest costs of electricity generation owing to its low material cost and ease of manufacturing. However, the full potential of polycrystalline CdTe photovoltaics can only be reali…
View article: Effect of CdCl2 passivation treatment on microstructure and performance of CdSeTe/CdTe thin-film photovoltaic devices
Effect of CdCl2 passivation treatment on microstructure and performance of CdSeTe/CdTe thin-film photovoltaic devices Open