Abstract
Photocurrent generation is one of the most important and fundamental processes in semiconductors, and it receives much attention in photovoltaic and photodetector applications. Very recently, to enhance the photon-to-current conversion efficiency, unique carrier generation processes such as multiple exciton generation and carrier up-conversion are being investigated extensively [1–4]. Although new materials and nanostructures have been fabricated for efficient photocurrent generation, control and measurement techniques of photocurrent generation have not yet been developed sufficiently. Photocurrent generation efficiency depends on many optical and electronic processes and crystal quality (impurities and defects) of semiconductors. These make it difficult to achieve coherent control of photocurrent.
© 2015 IEEE
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