PMID- 24967826 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20150511 LR - 20140711 IS - 2040-3372 (Electronic) IS - 2040-3364 (Linking) VI - 6 IP - 15 DP - 2014 Aug 7 TI - Polarized photocurrent response in black phosphorus field-effect transistors. PG - 8978-83 LID - 10.1039/c4nr02164a [doi] AB - We investigate electrical transport and optoelectronic properties of field effect transistors (FETs) made from few-layer black phosphorus (BP) crystals down to a few nanometers. In particular, we explore the anisotropic nature and photocurrent generation mechanisms in BP FETs through spatial-, polarization-, gate-, and bias-dependent photocurrent measurements. Our results reveal that the photocurrent signals at BP-electrode junctions are mainly attributed to the photovoltaic effect in the off-state and photothermoelectric effect in the on-state, and their anisotropic feature primarily results from the directional-dependent absorption of BP crystals. FAU - Hong, Tu AU - Hong T AD - Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN 37235, USA. yaqiong.xu@vanderbilt.edu. FAU - Chamlagain, Bhim AU - Chamlagain B FAU - Lin, Wenzhi AU - Lin W FAU - Chuang, Hsun-Jen AU - Chuang HJ FAU - Pan, Minghu AU - Pan M FAU - Zhou, Zhixian AU - Zhou Z FAU - Xu, Ya-Qiong AU - Xu YQ LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - England TA - Nanoscale JT - Nanoscale JID - 101525249 EDAT- 2014/06/27 06:00 MHDA- 2014/06/27 06:01 CRDT- 2014/06/27 06:00 PHST- 2014/06/27 06:00 [entrez] PHST- 2014/06/27 06:00 [pubmed] PHST- 2014/06/27 06:01 [medline] AID - 10.1039/c4nr02164a [doi] PST - ppublish SO - Nanoscale. 2014 Aug 7;6(15):8978-83. doi: 10.1039/c4nr02164a.