All solid state multiply layered PbS colloidal quantum-dot-sensitized photovoltaic cells

Sang Hyuk Im; Hi Jung Kim; Sung Woo Kim; Sang Wook Kim; Sang Ii Seok

doi:10.1039/c1ee01774h

All solid state multiply layered PbS colloidal quantum-dot-sensitized photovoltaic cells

Sang Hyuk Im, Hi Jung Kim, Sung Woo Kim, Sang Wook Kim, Sang Ii Seok

Research output: Contribution to journal › Article › peer-review

92 Citations (Scopus)

Abstract

The combination of solution processable colloidal quantum dots (CQDs) and organic conjugated polymers has attracted growing interest in the past few years, because devices fabricated using this combination can have potentially low cost and high efficiency. In this paper, we propose a new device architecture of multiply layered PbS CQD-sensitized photovoltaic cells. The multiple layers of PbS CQDs were formed by the repeated spin-coating of oleic-acid-capped PbS CQD solution and 1 wt% 1,2-ethanedithiol (EDT) solution onto mesoporous (mp)-TiO ₂ as photoanode. Through the structural advantage of a sensitized type device and post-treatment in 10 wt% EDT solution for 16 h, we could fabricate efficient photovoltaic cells having an overall energy conversion efficiency of 2.9% under 1 sun illumination, and an external quantum efficiency of over 15% at zero bias with a signal attenuation to frequency of 10 kHz levels in the near-infrared (NIR) range.

Original language	English
Pages (from-to)	4181-4186
Number of pages	6
Journal	Energy and Environmental Science
Volume	4
Issue number	10
DOIs	https://doi.org/10.1039/c1ee01774h
Publication status	Published - 2011 Oct
Externally published	Yes

ASJC Scopus subject areas

Environmental Chemistry
Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Pollution

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1039/c1ee01774h

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abstract = "The combination of solution processable colloidal quantum dots (CQDs) and organic conjugated polymers has attracted growing interest in the past few years, because devices fabricated using this combination can have potentially low cost and high efficiency. In this paper, we propose a new device architecture of multiply layered PbS CQD-sensitized photovoltaic cells. The multiple layers of PbS CQDs were formed by the repeated spin-coating of oleic-acid-capped PbS CQD solution and 1 wt% 1,2-ethanedithiol (EDT) solution onto mesoporous (mp)-TiO 2 as photoanode. Through the structural advantage of a sensitized type device and post-treatment in 10 wt% EDT solution for 16 h, we could fabricate efficient photovoltaic cells having an overall energy conversion efficiency of 2.9% under 1 sun illumination, and an external quantum efficiency of over 15% at zero bias with a signal attenuation to frequency of 10 kHz levels in the near-infrared (NIR) range.",

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AU - Kim, Sang Wook

AU - Seok, Sang Ii

PY - 2011/10

Y1 - 2011/10

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All solid state multiply layered PbS colloidal quantum-dot-sensitized photovoltaic cells

Abstract

ASJC Scopus subject areas

UN SDGs

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