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Photoresponse characteristics of MoS2 QDs/Si nanocone heterojunctions utilizing geometry controlled light trapping mechanism in black Si.
Nanotechnology 2019; 30(48):485202N

Abstract

A unique light trapping mechanism associated with nano-conical textured black Si templates has been utilized to achieve improved photoresponse in MoS2QDs/Si heterojunctions over a wide wavelength range from visible to near infrared. Black Si templates have been fabricated by a simple and cost effective metal assisted chemical etching technique followed by spin-coating of colloidal MoS2 quantum dots (QDs) to form the heterojunction. A peak responsivity of as high as ∼1.39 A W-1 at ∼665 nm for a bias of 5 V has been achieved. The responsivity value is higher as compared to recently published results having similar device structure. The combination of MoS2 QDs and black Si has resulted in a broader spectral response with enhanced optical absorption in the nano-conical heterojunction devices. Finite element based optical simulation results revealed the superiority of MoS2 QDs/Si nano-conical heterojunctions due to improved light trapping. The results appear attractive for next generation Si CMOS compatible broad band photodetectors using two dimensional semiconductors.

Authors+Show Affiliations

Advanced Technology Development Center, Indian Institute of Technology, Kharagpur-721302, India.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31426032

Citation

Sarkar, Arijit, et al. "Photoresponse Characteristics of MoS2 QDs/Si Nanocone Heterojunctions Utilizing Geometry Controlled Light Trapping Mechanism in Black Si." Nanotechnology, vol. 30, no. 48, 2019, p. 485202.
Sarkar A, Mukherjee S, Das AK, et al. Photoresponse characteristics of MoS2 QDs/Si nanocone heterojunctions utilizing geometry controlled light trapping mechanism in black Si. Nanotechnology. 2019;30(48):485202.
Sarkar, A., Mukherjee, S., Das, A. K., & Ray, S. K. (2019). Photoresponse characteristics of MoS2 QDs/Si nanocone heterojunctions utilizing geometry controlled light trapping mechanism in black Si. Nanotechnology, 30(48), p. 485202. doi:10.1088/1361-6528/ab3c9f.
Sarkar A, et al. Photoresponse Characteristics of MoS2 QDs/Si Nanocone Heterojunctions Utilizing Geometry Controlled Light Trapping Mechanism in Black Si. Nanotechnology. 2019 Aug 19;30(48):485202. PubMed PMID: 31426032.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photoresponse characteristics of MoS2 QDs/Si nanocone heterojunctions utilizing geometry controlled light trapping mechanism in black Si. AU - Sarkar,Arijit, AU - Mukherjee,Subhrajit, AU - Das,Amal Kumar, AU - Ray,Samit K, Y1 - 2019/08/19/ PY - 2019/8/20/pubmed PY - 2019/8/20/medline PY - 2019/8/20/entrez SP - 485202 EP - 485202 JF - Nanotechnology JO - Nanotechnology VL - 30 IS - 48 N2 - A unique light trapping mechanism associated with nano-conical textured black Si templates has been utilized to achieve improved photoresponse in MoS2QDs/Si heterojunctions over a wide wavelength range from visible to near infrared. Black Si templates have been fabricated by a simple and cost effective metal assisted chemical etching technique followed by spin-coating of colloidal MoS2 quantum dots (QDs) to form the heterojunction. A peak responsivity of as high as ∼1.39 A W-1 at ∼665 nm for a bias of 5 V has been achieved. The responsivity value is higher as compared to recently published results having similar device structure. The combination of MoS2 QDs and black Si has resulted in a broader spectral response with enhanced optical absorption in the nano-conical heterojunction devices. Finite element based optical simulation results revealed the superiority of MoS2 QDs/Si nano-conical heterojunctions due to improved light trapping. The results appear attractive for next generation Si CMOS compatible broad band photodetectors using two dimensional semiconductors. SN - 1361-6528 UR - https://www.unboundmedicine.com/medline/citation/31426032/Photoresponse_characteristics_of_MoS2_QDs/Si_nanocone_heterojunctions_utilizing_geometry_controlled_light_trapping_mechanism_in_black_Si L2 - https://doi.org/10.1088/1361-6528/ab3c9f DB - PRIME DP - Unbound Medicine ER -