Article

 

Extremely efficient photocurrent generation in carbon nanotube photodiodes enabled by a strong axial electric field Público Deposited

Conteúdo disponível para baixar

Baixar PDF
https://ir.library.oregonstate.edu/concern/articles/m039kb73p

Header

Attribute Name LabelAttribute Values Label
Creator
Abstract
  • Carbon nanotube (CNT) photodiodes have potential to convert light into electrical current with high efficiency. However, previous experiments have revealed photocurrent quantum yield (PCQY) well below 100%. In this work, we show that axial electric field increases the PCQY of CNT photodiodes. In optimal conditions our data suggest PCQY > 100%. We studied, both experimentally and theoretically, CNT photodiodes at room temperature using optical excitation corresponding to the S22, S33 and S44 exciton resonances. The axial electric field inside the pn junction was controlled using split gates that are capacitively coupled to the suspended CNT. Our results give new insight into the photocurrent generation pathways in CNTs, and the field dependence and diameter dependence of PCQY. Keywords: carbon nanotube, exciton dissociation, carrier multiplication, scanning photocurrent microscopy
License Label
Resource Type
Doi
Date issued
Has Journal
Has Volume
  • 20
Has Number
  • 1
Academic Affiliation
Declaração de direitos
Publisher
Language

Relações

Relationships Parent Rows Label

Rows Empty Text

Itens