# Enhancing silicon photodetector performance through spectral downshifting using core-shell CdZnS/ZnS and perovskite CsPbBr3 quantum dots

https://mdr.nims.go.jp/datasets/5c3a2401-1d7f-49af-be70-11b2d6fd90dc

## File

- [Revised Manuscript.docx](https://mdr.nims.go.jp/filesets/54386f79-0c7b-442c-9e30-6b6766ae9306/download) ([Detail](https://mdr.nims.go.jp/filesets/54386f79-0c7b-442c-9e30-6b6766ae9306.md))

## Id

5c3a2401-1d7f-49af-be70-11b2d6fd90dc

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-16T01:56:19.543608Z

## Updated at

2024-08-23T05:00:21.208525Z

## Published at

2026-06-03T00:12:34.525983Z

## Doi

https://doi.org/10.48505/nims.4679

## First published url

https://doi.org/10.1016/j.nanoen.2024.109832

## Date published

2024-06-03

## Recorded date published

2024-9

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Enhancing silicon photodetector performance through spectral downshifting
    using core-shell CdZnS/ZnS and perovskite CsPbBr3 quantum dots
  title_type: original
  lang: en

## Description

- description: 'Silicon (Si) photodetectors do not efficiently capture photons in
    the UV region: this has been a major impediment to their application in several
    areas. However, quantum dots (QDs), which convert higher-energy photons into lower-energy
    photons via spectral downshifting, have emerged as promising candidates for enhancing
    the UV response of silicon photodetectors. In this study, we investigate the performance
    of Si photodetectors in the form of sensitized perovskite (CsPbBr3) quantum dots
    and compare them with core-shell (CdZnS/ZnS) quantum dots for spectral downshifting
    applications. Using monolithic integration of quantum dots over the silicon photodetector
    surface, we systematically analyze their electrical and optical characteristics
    to elucidate the impact of quantum dot structures on device performance. Spectral
    responsivity measurements reveal a significant enhancement in detector performance
    over a broad spectral range (300 nm - 1100 nm) after sensitization with quantum
    dots. Reflectance studies suggest that apart from spectral downshifting, the quantum
    dot layers act as anti-reflection coatings, contributing to overall performance
    enhancement. Additionally, current-voltage characteristics indicate the formation
    of a space charge region at the Si-quantum dot interface, further enhancing device
    performance. Further opto-electronic testing demonstrates the superior performance
    and stability of CdZnS/ZnS core-shell QD-sensitized devices compared to perovskite
    CsPbBr3 QD-devices. Our study provides valuable insights into the design and optimization
    of Si photodetectors with improved sensitivity and extended spectral response.'
  description_type: abstract
  lang: und

## Creator

- name: Kumaar Swamy Reddy Bapathi
  role: author
- name: Mostafa F. Abdelbar
  role: author
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Wipakorn Jevasuwan
  role: author
  orcid: https://orcid.org/0000-0001-9117-2497
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Qinqiang Zhang
  role: author
  orcid: https://orcid.org/0000-0001-7242-1718
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Pramod H. Borse
  role: author
- name: Sushmee Badhulika
  role: author
- name: Naoki Fukata
  role: author
  orcid: https://orcid.org/0000-0002-0986-8485
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: quantum dot
  schema: not_defined
- subject: spectral downshifting
  schema: not_defined
- subject: photodetector
  schema: not_defined
- subject: solution-processed
  schema: not_defined
- subject: silicon
  schema: not_defined

## Rights

- description: "© 2024. This manuscript version is made available under the CC-BY-NC-ND
    4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/"
  identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-06-03
end_date: 2026-06-03

## Journal

- title: Nano Energy
  issn: '22112855'
  volume: '128'
  article_number: '109832'

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## Instrument



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: 54386f79-0c7b-442c-9e30-6b6766ae9306
  filename: Revised Manuscript.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 3816869
  md5: 39ea6ce7ea0af06d9dc98981c83ec720

## Thumbnail

fileset_id: 54386f79-0c7b-442c-9e30-6b6766ae9306
filename: Revised Manuscript.docx