Room temperature photocurrent response of PbS/InP heterojunction

Zhijun Liu; Jin Ho Kim; Fernandes, Gustavo E.; Xu, Jimmy
December 2009
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p231113
Academic Journal
We report on the observation of photocurrent response of a PbS/InP heterojunction. The PbS/InP heterostructure is synthesized via aqueous solution-based heteroepitaxial growth, and is fabricated into a photodetector. At zero bias, two photoresponse bands between 0.75 and 3.1 μm are measured at room temperature, which correspond to interband photocarrier generations in PbS and InP, respectively. An anomalous polarity of the photocurrent is observed and its possible origins are analyzed.


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