Pyroelectric-Enhanced Position Sensing and Its Multifunctional Imaging in a Si Nanowire/CdS Core-Shell Heterojunction.

Three different Si/CdS heterojunction position-sensitive detectors with planar, pyramid, and nanowire structures are successfully prepared and systematically investigated. Among these configurations, the nanowire core-shell structure demonstrates superior self-powered capability and exceptional lateral photovoltaic effect (LPE) performance, achieving a broad optical response from 405 to 1064 nm, a peak positional sensitivity of 779.1 mV/mm, and a minimal nonlinearity of just 6.