Projects per year
Abstract
The performance of Cu2ZnSn(S,Se)4 thin-film solar cells, commonly referred to as kesterite or CZTSSe, is limited by open-circuit voltage (VOC) values less than 60% of the maximum theoretical limit. In the present study, we employ energy-filtered photoemission microscopy to visualize nanoscale shunting paths in solution-processed CZTSSe films, which limit the VOC of cells to approximately 400 mV. These studies unveil areas of local effective work function (LEWF) narrowly distributed around 4.9 eV, whereas other portions show hotspots with LEWF as low as 4.2 eV. Localized valence band spectra and density functional theory calculations allow rationalizing the LEWF maps in terms of the CZTSSe effective work function broadened by potential energy fluctuations and nanoscale Sn(S,Se) phases.
Original language | English |
---|---|
Pages (from-to) | 36-46 |
Journal | iScience |
Volume | 9 |
DOIs | |
Publication status | Published - 1 Nov 2018 |
Fingerprint Dive into the research topics of 'Mapping Shunting Paths at the Surface of Cu2ZnSn(S,Se)4 Films via Energy-Filtered Photoemission Microscopy'. Together they form a unique fingerprint.
Projects
- 1 Finished
-
NanoESCA II: NanoESCA-Electron Spectroscopy for Chemical Analysis imaged at the Nanoscale (full application)
1/05/15 → 30/04/20
Project: Research
Equipment
-
Bristol University NanoESCA Laboratory (BrUNEL)
Neil Fox (Manager) & Mattia Cattelan (Manager)
School of ChemistryFacility/equipment: Facility
Profiles
-
Professor Neil A Fox
- School of Chemistry - Professor of Materials for Energy
- Cabot Institute for the Environment
- The Bristol Centre for Nanoscience and Quantum Information
- Soft Matter, Colloids and Materials
- Materials for Energy
Person: Academic , Member