Chalcogenide Impurities Removal
An etching process can selectively remove chalcogenide impurities that plague Copper Zinc Tin Sulfide (CZTS) and Copper Indium Gallium Selenide (CIGS), important light absorber materials used in thin film solar cell devices. Even small amounts of these impurities, such as copper sulfide and copper selenide, can render photovoltaic devices unusable. The novel solvent mixture, which is at least as effective as current approaches, selectively removes these impurities in just 20 minutes.
Safer Thin Film Solar Cell Purification
Current methods to remove impurities from CZTS and CIGS thin films require either potassium cyanide (KCN) or hydrazine, both highly hazardous, toxic chemicals that may create additional harmful byproducts when used. The new approach uses significantly less toxic mercaptoethanol and ethylenediamine reagents, making it a safer and greener substitute for removing copper sulfide and copper selenide impurities.
BENEFITS AND FEATURES:
- More effective at selective removal of impurities
- Mercaptoethanol and ethylenediamine reagents are safer and easier to handle
- Purifies CIGS and CZTS thin film solar cells
- CIGS and CZTS thin film solar cells
- Improved thin films for use in photovoltaic cells
- Dissolution of various chalcogenides
- Coating/printing of chalcogenide materials
- Patterning of chalcogenide structures by etching
Phase of Development Proof of concept