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Stable amorphous silicon and improved microcrystalline silicon by photon-assisted electron cyclotron resonance chemical vapor deposition

  • SUNY Buffalo

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Amorphous (a-Si) and microcrystalline silicon (μc-Si) are widely used in photovoltaics and thin film transistors. These products suffer from instability and less than desired electrical properties. We have utilized photon-assisted electron cyclotron resonance chemical vapor deposition (PA-ECRCVD) resulting in great improvement in both areas. For example, PA-ECRCVD compared with conventional ECR-CVD gives carrier lifetime of 1.35 μs compared to 0.17 μs, and photovoltaic solar cell efficiency of 10% compared to 5.9%. Moreover, the PA-ECRCVD cell only degraded to 9.8% compared to the ECR-CVD cell degradation to 5.5%, under long term exposure to tungsten lamp illumination. In addition, PA-ECRCVD gives much enhanced crystallinity in μc-Si as revealed by atomic force microscopy and Raman spectroscopy.

Original languageEnglish
Pages (from-to)49-54
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume557
DOIs
StatePublished - 1999
EventThe 1999 MRS Spring Meeting - Symposium A 'Amorphous and Heterogenous Silicon Thin Films: Fundamentals to Devices' - San Francisco, CA, USA
Duration: Apr 5 1999Apr 9 1999

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