# Fileset

[Supplementary.docx](https://mdr.nims.go.jp/filesets/8900a57d-6af5-46c1-8377-e19435a52767/download)

## Creator

Kumaar Swamy Reddy Bapathi, Mostafa F. Abdelbar, [Wipakorn Jevasuwan](https://orcid.org/0000-0001-9117-2497), Pramod H. Borse, Sushmee Badhulika, [Naoki Fukata](https://orcid.org/0000-0002-0986-8485)

## Rights

[Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International](https://creativecommons.org/licenses/by-nc-nd/4.0/)

## Other metadata

[Cumulative effect of spectral downshifting, anti-reflection and space-charge region formation in enhancing the spectral response of self-powered silicon photodetectors on sensitisation with CdZnS/ZnS core-shell quantum dots](https://mdr.nims.go.jp/datasets/6dba3831-08be-4fb1-bd5e-6dd12365ca75)

## Fulltext

Cumulative effect of spectral downshifting, anti-reflection and space charge region formation in enhancing the spectral response of Self-powered Silicon photodetector on sensitisation with CdZnS/ZnS Core-shell Quantum dotsKumaar Swamy Reddy Bapathi abc, Mostafa F. Abdelbar cd, Wipakorn Jevasuwan c, Pramod H Borse b, Sushmee Badhulika a*  and Naoki Fukata c*a Department of Electrical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Hyderabadb Centre for Solar Energy Materials, International Advanced Research Centre for PowderMetallurgy & New Materials, Balapur, Hyderabadc Research Centre for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japand Institute of Nanoscience & Nanotechnology, Kafrelsheikh University, 33516 Kafrelsheikh, EgyptFigure S1. Quantum dots particle size distributionFigure S2. EDS spectrum of CdZnS/ZnS core-shell quantum dots.Figure S3. CdZnS/ZnS quantum dots under a) Ambient light and b) UV illuminationFigure S4. SEM images of Pristine Silicon and CdZnS/ZnS QD films deposited films deposited on Silicon. a) Pristine Silcon b) 1 Layer QDs, c) 2 Layer QDs, d) 3 Layer QDs, e) 4 Layer QDs and f) 5 Layer QDs. Figure S5. Temporal response of the detector under varied light intensities (0.1 – 2 mW/cm2 a) 300 nm, b) 600 nm, and c) 820 nmFigure S6. I-V characteristics of Control Si devices with a) Ti-Ag and b) Ag electrodesFigure S7. Photocyclic stability of CdZnS/ZnS QD- Si photodetector under a) 320 nm, b) 600 nm and, c) 900 nm Materials Synthesis/ Fabrication technique Architecture Spectral Response Bias Responsivity Rise Time Detectivity Ref PbSe QDs Hot Injection and Spin Coating Au-(Si - ZnO-PbSe QD)-Au 808 nm 1V 100 mA/W 340 ms 1.86 × 1011 Jones 1 SiNWs-Carbon QDs Electrochemical Etching and Spin coating In/Ga – (n-SiNW – Carob QDs) - Au 300-1100 nm 0V 350 mA/W 20 µs 3.79 × 109 2 Si- Carbon QDs Hydrothermal and Drop coating Al/Si/C-QDs/Ag 352—850 nm 0V 9.4 mA/W 10 µs 5.9 × 1012 3 MoS2-CuInS2 QDs-AuNPs Hot injection and spin coating Au- ( MoS2-CuInS2-AuNPs) -Au 405 – 635 nm 4V 16.65 mA/W 5s 2.2 x 1012 4 SWCNT-PbSQDs-MAPbX3 Hot injection and dip coating ITO –( SWCNT-PbSQDs-MAPbX3)- ITO 30-1500 nm 1V 500 mA/W 250 µs 1.4 × 1011 Jones 5 MXene/CsPbBr3 Hot injection and spin coating Au - ( MXene/CsPbBr3) - Au 300-550 nm 1V 0.1 mA/W 48.2 ms 108 6 AgAuSe QDs Hot injection and spin coating Au – AgAuSe-Au 808 nm 0V 0.35 mA/W 3.1 s 1.55 × 1010 Jones 7 CsPbBr3 (SbBr3) Hydrothermal and Drop coating FTO-CsPbBr3-Al 405 nm 0V 0.048 mA/W 98 ms No data 8 Si-PbS QDs Hot injection and spin coating Ti/Pt/Au-P-Si-SiNx-(PbS-TBAI)-ITO 1064 nm 0V 250 mA/W 20 µs 7.74 × 1010 9 Si  - CdZnS/ZnS core-shell QDs Hydrothermal and Drop coating Ti/Ag – Si – CdZnS/ZnS - Ag 300- 1100 nm 0V 350 mA/W 82 ms 2.89 x 1012 This WorkTable S1. Comparison of our fabricated CdZnS/ZnS QD-Si device with other QD based detectors.(1) Peng, M.; Liu, Y.; Li, F.; Hong, X.; Liu, Y.; Wen, Z.; Liu, Z.; Ma, W.; Sun, X. Room-Temperature Direct Synthesis of PbSe Quantum Dot Inks for High-Detectivity Near-Infrared Photodetectors. ACS Appl. Mater. Interfaces 2021, 13 (43), 51198–51204. https://doi.org/10.1021/acsami.1c13723.(2) Xie, C.; Nie, B.; Zeng, L.; Liang, F.-X.; Wang, M.-Z.; Luo, L.; Feng, M.; Yu, Y.; Wu, C.-Y.; Wu, Y.; Yu, S.-H. Core–Shell Heterojunction of Silicon Nanowire Arrays and Carbon Quantum Dots for Photovoltaic Devices and Self-Driven Photodetectors. ACS Nano 2014, 8 (4), 4015–4022. https://doi.org/10.1021/nn501001j.(3) Hsiao, P.-H.; Kuo, K.-Y.; Chen, Y.; Wu, T.-Y.; Chen, C.-Y. Balance of Photon Management and Charge Collection from Carbon-Quantum-Dot Layers as Self-Powered Broadband Photodetectors. Nanoscale Adv. 2023, 5 (4), 1086–1094. https://doi.org/10.1039/D2NA00852A.(4) Qin, S.; Li, K.; Zhu, J.; Xu, H.; Ali, N.; Rahimi-Iman, A.; Wu, H. A New Strategy to Improve the Performance of MoS2-Based 2D Photodetector by Synergism of Colloidal CuInS2 Quantum Dots and Surface Plasma Resonance of Noble Metal Nanoparticles. J. Alloys Compd. 2021, 856, 158179. https://doi.org/10.1016/j.jallcom.2020.158179.(5) Ka, I.; Gerlein, L. F.; Asuo, I. M.; Nechache, R.; Cloutier, S. G. An Ultra-Broadband Perovskite-PbS Quantum Dot Sensitized Carbon Nanotube Photodetector. Nanoscale 2018, 10 (19), 9044–9052. https://doi.org/10.1039/C7NR08608C.(6) Li, H.; Li, Z.; Liu, S.; Li, M.; Wen, X.; Lee, J.; Lin, S.; Li, M.-Y.; Lu, H. High Performance Hybrid MXene Nanosheet/CsPbBr3 Quantum Dot Photodetectors with an Excellent Stability. J. Alloys Compd. 2022, 895, 162570. https://doi.org/10.1016/j.jallcom.2021.162570.(7) Wang, Z.; Liu, F.; Gu, Y.; Hu, Y.; Wu, W. Solution-Processed Self-Powered near-Infrared Photodetectors of Toxic Heavy Metal-Free AgAuSe Colloidal Quantum Dots. J. Mater. Chem. C 2022, 10 (3), 1097–1104. https://doi.org/10.1039/D1TC03837K.(8) Subramaniam, M. R.; Pramod, A. K.; Hevia, S. A.; Batabyal, S. K. Enhanced Photoluminescence Quantum Yield, Lifetime, and Photodetector Responsivity of CsPbBr3 Quantum Dots via Antimony Tribromide Post-Treatment. J. Phys. Chem. C 2022, 126 (3), 1462–1470. https://doi.org/10.1021/acs.jpcc.1c07493.(9) Wang, J.; Chen, J. High-Sensitivity Silicon: PbS Quantum Dot Heterojunction near-Infrared Photodetector. Surf. Interfaces 2022, 30, 101945. https://doi.org/10.1016/j.surfin.2022.101945.image4.pngimage5.pngimage6.pngimage7.pngimage8.pngimage1.pngimage2.jpegimage3.emf Cd%  Zn%  S%  8.50  43.49  48.01