Journal
NANOTECHNOLOGY
Volume 29, Issue 20, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aab3f9
Keywords
silicon nanopyramid; copper nanoparticle; light trapping; lateral photovoltaic effect; photodetection
Funding
- National Natural Science Foundation of China [11374214, 61574090, 10974135]
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Silicon nanopyramids with the excellent ability of light absorption have been mostly reported in solar cells. Here, we report an obviously enhanced lateral photovoltaic effect (LPE) in copper-nanoparticle-covered random Si nanopyramids (Cu@Si-pyramid). Remarkable photoelectric responses are achieved in broadband from 405 to 780 nm. Furthermore, a prominent LPE is double-enhanced from 74.0 to 157.9 mV mm(-1) when the linear region decreases from 3 to 1 mm. Finite-difference time-domain simulation is applied to investigate the origin of the exceptional results. This work declares a position-sensitive property of Si-nanopyramid systems and proposes promising applications to photodetections based on LPE.
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