| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Charge Extraction by Linearly Increasing Voltage (CELIV): From One-data Point Measurement to Mobility Mapping in Solar Energy Materials |
| Author(s) |
Giovanni Fanchini, Noah Stocek, Miguel Young, Tianhao Ouyang, Reg Bauld |
| On-Site Speaker (Planned) |
Giovanni Fanchini |
| Abstract Scope |
Improvement of transport properties in semiconductors for solar energy is critical for enabling these energy-generating materials to efficiently compete with fossil fuels. Charge extraction by linearly increasing voltage (CELIV) is a critical tool for determining the carrier mobility in photoactive materials, in which the device is illuminated by laser pulses, thus photogenerating charge packets under an electric field ramp. The charge-packet offer information on the photocarrier mobility. While CELIV has successfully assisted the design of virtually all of the new photoactive energy materials developed over the last decade (including photoconductive polymers and perovskites) it has been often used as one-data point measurements, with significant limitations on the information that can be extracted. Here, we will review the advantages of CELIV for designing high-mobility photoactive semiconductors and demonstrate how our group has integrated this technique with super-resolution microscopy to extend this method for cross-sectional and mapping purposes in commercial energy materials. |