Origin of photoresponse in black phosphorus phototransistors

By Tony Low, Michael Engel, M. Steiner, Phaedon Avouris. 2014

178 citations recorded by the source corpus.

We study the origin of a photocurrent generated in doped multilayer black phosphorus (BP) phototransistors, and find that it is dominated by thermally driven thermoelectric and bolometric processes. The experimentally observed photocurrent polarities are consistent with photothermal processes. The photothermoelectric current can be generated up to a micrometer away from the contacts, indicating a long thermal decay length. With an applied source-drain bias, a photobolometric current is generated across the whole device, overwhelming the photothermoelectric contribution at a moderate bias. The photoresponsivity in the multilayer BP device is two orders of magnitude larger than that observed in graphene.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/58d812a33da018fa745eb54570f27be10396b873

How researchers see this paper

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In Electrical and Electronic Engineering

1. Gang Zhang
2. Yong‐Wei Zhang
3. Yongqing Cai
4. Z. Ong
5. V. Sorkin
6. Xingzhu Chen
7. Xiujian Zhao
8. Pengfei Chen

In Materials Chemistry

1. Yong‐Wei Zhang
2. Gang Zhang
3. Yongqing Cai
4. Z. Ong
5. V. Sorkin
6. Xingzhu Chen
7. Xiujian Zhao
8. Pengfei Chen

Citations in the corpus

• Recent advances in synthesis, properties, and applications of phosphorene (2017, background): “The study by Low et al.(106) has demonstrated that the photocurrent is dominated by thermally driven thermoelectric and bolometric processes rather than the photovoltaic effect.”
• The rising star of 2D black phosphorus beyond graphene: synthesis, properties and electronic applications (2017, background): “The contact of metals and black phosphorus therefore acted as a thermocouple producing a hole current flowing into the channel (figure 6(b) top) [120].”
• Recent Advances in the Study of Phosphorene and its Nanostructures (2017, background): “Low et al.(125) provide strong evidence that transport of spatially distributed hot-electron carriers, rather than the photovoltaic effect, dominates the”