In-Situ Sensors for Process Control of CuIn(Ga)Se2: Phase II Annual Report, February 1999 - February 2000

This report summarizes the work performed by Materials Research Group, Inc., in Phase II of this subcontract. Progress toward the development of in-situ sensors for CuIn(Ga)Se2 (CIGS) during Phase II includes:; - design and assembly of a low-cost X-ray fluorescence (XRF) sensor suitable for in-situ use and real-time control;; - demonstration of agreement between theory and experiment for XRFmeasurement simple systems using the XRF sensor;; - demonstration of agreement between inductively coupled plasma (ICP) and XRF results over a wide variety of CIGS samples;; - initial design of hardware protecting XRF sensor in heated, Se ambient; ; - resolution of a number of installation issues, including specification of measurement time versus sensor-to-sample distance, utilitiesrequirements, and vibration restrictions; ; - development of software for sensor operation and the automatic extraction of composition data; and interaction with National CIS R&D Team industrial partners to specify and adapt sensor functions.