Kristen Parratt ’13


Chemical and Biological Engineering

Project Title

How Molecular Structure Influences Device Performance in Organic Solar Cells

Presentation Link

View Kristen's Presentation

This summer I investigated the relationship between molecular structure and device performance in organic field-effect transistors. By blending two compounds with similar structures but different energy levels, I was able to create a range of blend ­morphologies. These showed a correlation between the blend composition and device mobility, that I then continued to investigate using Atomic Force Microscopy and Differential Scanning Calorimetry. In the end, I found that the device performance improved with more ­diffuse grain boundaries, and reached a maximum at an eutectic point. Many thanks for a wonderful summer to Professor Loo, Stephanie Lee, and the Loo Group!

Internship Year


Project Category

Climate and Energy


Princeton University, Princeton, New Jersey


Yueh-Lin (Lynn) Loo, Professor of Chemical and Biological Engineering, Deputy Director, Andlinger Center for Energy and the Environment