Hot Carrier–Assisted Intrinsic Photoresponse in Graphene

2011/08/31 by Nathaniel M. Gabor, Justin C. W. Song, Qiong Ma +9 · 12 citations
Engineering · Materials Science · Physics and Astronomy · #Advanced Memory and Neural Computing #Bilayer graphene #Charge carrier #Graphene #Graphene research and applications #Materials science #Monolayer #Nanoscopic scale #Nanotechnology #Optoelectronics #Photonics #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1126/science.1211384

published as Science 334 (6056), p. 648-652 (2011) · 19 pages, 4 figures

openalex publication_date 2011/10/07 · arxiv created 2011/11/17 · arxiv updated 2011/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report on the intrinsic optoelectronic response of high-quality dual-gated monolayer and bilayer graphene p-n junction devices. Local laser excitation (of wavelength 850 nanometers) at the p-n interface leads to striking six-fold photovoltage patterns as a function of bottom- and top-gate voltages. These patterns, together with the measured spatial and density dependence of the photoresponse, provide strong evidence that nonlocal hot carrier transport, rather than the photovoltaic effect, dominates the intrinsic photoresponse in graphene. This regime, which features a long-lived and spatially distributed hot carrier population, may offer a path to hot carrier-assisted thermoelectric technologies for efficient solar energy harvesting.

Citations

• Transport Measurements Across a Tunable Potential Barrier in Graphene
• Biased Bilayer Graphene: Semiconductor with a Gap Tunable by the Electric Field Effect
• Electronic Transport and Quantum Hall Effect in Bipolar Graphenep−n−pJunctions

Cited by

• Near-field photocurrent nanoscopy on bare and encapsulated graphene
• Thermoelectric effects in graphene with local spin-orbit interaction
• Hot Electron Cooling by Acoustic Phonons in Graphene
• Cooling of photoexcited carriers in graphene by internal and substrate phonons
• Light-field control of real and virtual charge carriers
• Hot-carrier photocurrent effects at graphene–metal interfaces
• Photocurrent generation in a metallic transition-metal dichalcogenide
• Near-field thermal radiation transfer controlled by plasmons in graphene
• Energy transport via multiphonon processes in graphene
• Hot-Carrier Seebeck Effect: Diffusion and Remote Detection of Hot Carriers in Graphene
• Impact ionization dynamics in small band-gap two-dimensional materials from a coherent phonon mechanism
• Resonant plasmonic terahertz detection in graphene split-gate field-effect transistors with lateral p–n junctions

Related

• New Aspects of Photocurrent Generation at Graphene pn Junctions Revealed by Ultrafast Optical Measurements
• Evidence for Extraction of Photoexcited Hot Carriers from Graphene
• THz-circuits driven by photo-thermoelectric graphene-junctions
• Multiple Hot-Carrier Collection in Photo-Excited Graphene Moire Superlattices
• Dirac excited state quenching in graphene