Digital alloy contact layers for perovskite solar cells
| Autor: | Benjamin Isenhart, Sean P. Dunfield, Matthew S. White, Ekraj Dahal, Joseph J. Berry, Bin Du, Olivia Sergiovanni |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Alloy 02 engineering and technology Electron engineering.material 010402 general chemistry 01 natural sciences Pulsed laser deposition Materials Chemistry Deposition (phase transition) Thin film Perovskite (structure) business.industry Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Semiconductor Mechanics of Materials engineering Optoelectronics Nanometre 0210 nano-technology business |
| Zdroj: | Synthetic Metals. 266:116412 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2020.116412 |
| Popis: | Thin film optoelectronic devices commonly require an individual material to perform multiple functions, but the physical properties of single-composition materials often cannot be tuned to optimize these diverse requirements. The electron selective contact layer in perovskite solar cells is a prime example. The material must simultaneously have optimal conduction band alignment, facilitate carrier extraction, prevent recombination, and provide a chemically stable interface with the notoriously volatile perovskite semiconductor. The pulse-by-pulse nature of the thin-film deposition method pulsed laser deposition (PLD) provides an opportunity to form material alloys where the chemical composition is controlled at the nanometer scale. These digital alloys may prove to be a powerful materials class to meet some of the multifunctional needs of thin film devices. Using PLD to make electron transport layers from ZnO and MgZnO targets, we demonstrate that digital alloy gradients can be tuned to significantly outperform either of the parent materials in perovskite solar cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect