(775e) CIGS Nanocrystal Solar Cells on Plastics and Paper

Authors: 
Harvey, T. B., Texas A&M University-Central Texas
Korgel, B. A., The University of Texas at Austin
Voggu, V. R., The University of Texas at Austin
Morehead, S., The University of Texas at Austin
Solar power has made enormous inroads in the past decade as a renewable energy source, primarily due to decreased Si solar panel cost. Additional opportunities are available to utilize solar power by integrating with buildings and transportation, powering low-power portable devices and wearables, and meet emergency and non-grid energy generation needs. However, bulky and rigid Si solar panels are ill fit to meet these needs. Low-cost, lightweight, flexible photovoltaics (PVs) are needed to extend the reach of solar power.

This presentation summarizes our work using Copper Indium Selenide (CIS) nanocrystal inks to build solar panels on a variety of low cost, heat intolerant substrates. CIS nanocrystal PVs have been fabricated using a variety of print methods on plastics such as polyethylene terephthalate (PET) and cellulose nanofiber paper, with champion devices reaching 2.8% and 2.25% respectively. Devices on paper demonstrated no performance loss even when flexed up to 100 times at a 5 mm radius. Additionally, devices with over 2% efficiency were demonstrated with all printed window layers.