Transient photoluminescence measurements

Details Transient photoluminescence measurements Transient photoluminescence measurements

2011-02-22

2011-02-22

Porta, David P. (Department: 2884)

Radiant energy

Invisible radiation responsive nonelectric signalling

C250S483100, C250S492100, C250S492200

Reexamination Certificate

active

07893409

ABSTRACT:
A photoluminescence mapping system and method for use in fabricating solar cells that eliminates the need for complex and expensive light sources, filters and high sensitivity cameras. Generally, the method includes: (i) irradiating a surface of the substrate with radiation having a predetermined energy for a first predetermined period of time to photogenerate carriers therein; (ii) stopping the irradiation; (iii) exposing the surface of the substrate to a camera for a second predetermined period of time; and (iv) capturing with the camera a photoluminescence (PL) signal emitted from the surface of the substrate.

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