Extraordinary Photocurrent Harvesting at Type-II HeterojunctionInterfaces: Toward High Detectivity Carbon Nanotube Infrared Detectors
Abstract
Despite the potentials and the efforts put in the development of uncooled carbon nanotube infrared detectors during the past two decades, their figure-of-merit detectivity remains orders of magnitude lower than that of conventional semiconductor counterparts due to the lack of efficient exciton dissociation schemes. In this paper, we report an extraordinary photocurrent harvesting configuration at a semiconducting single-walled carbon nanotube (s-SWCNT)/polymer type-II heterojunction interface, which provides highly efficient exciton dissociation through the intrinsic energy offset by designing the s-SWCNT/polymer interface band alignment. This results in significantly enhanced near-infrared detectivity of 2.3 x 10(exp 8) cm. sq root of Hz/W, comparable to that of the many conventional uncooled infrared detectors. With further optimization, the s-SWCNT/polymer nanohybrid uncooled infrared detectors could be highly competitive for practical applications.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 06, 2012
- Accession Number
- ADA612013
Entities
People
- Alec Kirkeminde
- Caleb Christianson
- Judy Z. Wu
- Rongtao Lu
- Shenqiang Ren
Organizations
- University of Kansas