Pulsed UV laser annealing of polycrystalline CdTe

Brian J. Simonds; Vasilios Palekis; M. I. Khan; Chris S. Ferekides; Michael A. Scarpulla

doi:10.1117/12.2024437

16 September 2013 Pulsed UV laser annealing of polycrystalline CdTe

Brian J. Simonds, Vasilios Palekis, M. I. Khan, Chris S. Ferekides, Michael A. Scarpulla

Proceedings Volume 8826, Laser Material Processing for Solar Energy Devices II; 882607 (2013) https://doi.org/10.1117/12.2024437
Event: SPIE Solar Energy + Technology, 2013, San Diego, California, United States

Abstract

Presented here are the results of a three dimensional, finite element simulation that models pulsed, ultraviolet (UV) laser annealing of polycrystalline CdTe. The model considers heat generated by the absorption of a 25 ns, 248 nm laser pulse normally incident to a 5 μm thick CdTe thin film deposited on a polycrystalline alumina substrate. In particular, focus is on the spatial and temporal distribution of temperature from laser fluences that achieve a sub-melting condition. The model shows that there are very large temperature gradients both in depth and in-plane directions. These predictions, as well as the onset of melting, are confirmed with cross sectional scanning electron microscopy. Additionally, the model predicts that the heat generated dissipates rapidly after the pulse has ended. This has implications if pulse trains are to be used experimentally.

Citation Download Citation

Brian J. Simonds, Vasilios Palekis, M. I. Khan, Chris S. Ferekides, and Michael A. Scarpulla "Pulsed UV laser annealing of polycrystalline CdTe", Proc. SPIE 8826, Laser Material Processing for Solar Energy Devices II, 882607 (16 September 2013); https://doi.org/10.1117/12.2024437

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available