Details

Autor(en) / Beteiligte

• Zhang, Jiazhen
• Yang, Luhan
• Wang, Lin
• Chen, Gang
• Chen, Xiaoshuang

Titel

Wavelength-dependent negative/positive photoresponses in single-walled carbon nanotube/PbS quantum dot mixed-dimensional heterostructures

Ist Teil von

• Optical and quantum electronics, 2023-02, Vol.55 (2), Article 144

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Springer Nature - Complete Springer Journals

Beschreibungen/Notizen

• Heterostructure based on single-walled carbon nanotubes (SWCNTs) and lead sulfide quantum dots (PbS QDs) is promising in high-performance visible-to-infrared detection, attributed to high gain and efficiencies of charge separation and transport. Herein, a hybrid photodetector based on the SWCNT/PbS QDs heterostructure is constructed and demonstrates negative/positive photoresponse depending on the wavelength of incident light. The dependence is mainly attributed to the trapping effects coming from the ligand states and oxygen adsorption. Compared with pristine SWCNTs device, the hybrid device demonstrates greatly enhanced (EQE ~ 503% and D * ~1.0 × 10 7 Jones) positive response, due to long-wavelength photoexcitation through a direct band-to-band transition, which indicates a prospective application potential.