A simple strategy for improving the energy conversion of multilayered CdTe quantum dot-sensitized solar cells

Guo Yu Lan; Zusing Yang; Yang Wei Lin; Zong Hong Lin; Hao Ying Liao; Huan Tsung Chang

doi:10.1039/b817000b

A simple strategy for improving the energy conversion of multilayered CdTe quantum dot-sensitized solar cells

Guo Yu Lan, Zusing Yang, Yang Wei Lin, Zong Hong Lin, Hao Ying Liao, Huan Tsung Chang^*

^*Corresponding author for this work

National Taiwan University

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

93 Scopus citations

Abstract

In this paper we describe the preparation of CdTe quantum dot-sensitized solar cells (QDSSCs). We coated FTO substrates with 21 nm-diameter TiO₂ nanoparticles (NPs) and then immersed the system in poly(dimethyldiallylammonium chloride) (PDDA) solution under ambient conditions. The treated substrates were then subjected to 3 nm-diameter CdTe NP solution at 100 °C for various periods of times. To increase the degree of deposition and to obtain CdTe QDs of various sizes, we performed the coating of the CdTe QDs through three heating cycles for 24, 12, or 6 h. The as-prepared (TiO₂)₃-PDDA-(QD_CdTe)₃-FTO electrodes were then used to fabricate (TiO₂)₃-PDDA-(QD_CdTe)₃-FTO QDSSCs employing 1-ethyl-3-methylimidazolium thiocyanate incorporating 1.0 M LiI and 0.1 M I₂ as electrolytes. The heating treatment allows the QDSSCs to harvest energy at a higher efficiency in the visible region of solar light. As a result, the as-prepared QDSSCs feature a high energy conversion efficiency (η = 2.02%) and a high open-circuit photovoltage (V_oc = 850 mV) at 100% sunlight (AM1.5, 100 mW/cm²).

Original language	English
Pages (from-to)	2349-2355
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	19
Issue number	16
DOIs	https://doi.org/10.1039/b817000b
State	Published - 07 04 2009
Externally published	Yes

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title = "A simple strategy for improving the energy conversion of multilayered CdTe quantum dot-sensitized solar cells",

abstract = "In this paper we describe the preparation of CdTe quantum dot-sensitized solar cells (QDSSCs). We coated FTO substrates with 21 nm-diameter TiO2 nanoparticles (NPs) and then immersed the system in poly(dimethyldiallylammonium chloride) (PDDA) solution under ambient conditions. The treated substrates were then subjected to 3 nm-diameter CdTe NP solution at 100 °C for various periods of times. To increase the degree of deposition and to obtain CdTe QDs of various sizes, we performed the coating of the CdTe QDs through three heating cycles for 24, 12, or 6 h. The as-prepared (TiO2)3-PDDA-(QDCdTe)3-FTO electrodes were then used to fabricate (TiO2)3-PDDA-(QDCdTe)3-FTO QDSSCs employing 1-ethyl-3-methylimidazolium thiocyanate incorporating 1.0 M LiI and 0.1 M I2 as electrolytes. The heating treatment allows the QDSSCs to harvest energy at a higher efficiency in the visible region of solar light. As a result, the as-prepared QDSSCs feature a high energy conversion efficiency (η = 2.02%) and a high open-circuit photovoltage (Voc = 850 mV) at 100% sunlight (AM1.5, 100 mW/cm2).",

author = "Lan, {Guo Yu} and Zusing Yang and Lin, {Yang Wei} and Lin, {Zong Hong} and Liao, {Hao Ying} and Chang, {Huan Tsung}",

year = "2009",

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T1 - A simple strategy for improving the energy conversion of multilayered CdTe quantum dot-sensitized solar cells

AU - Lan, Guo Yu

AU - Yang, Zusing

AU - Lin, Yang Wei

AU - Lin, Zong Hong

AU - Liao, Hao Ying

AU - Chang, Huan Tsung

PY - 2009/4/7

Y1 - 2009/4/7

N2 - In this paper we describe the preparation of CdTe quantum dot-sensitized solar cells (QDSSCs). We coated FTO substrates with 21 nm-diameter TiO2 nanoparticles (NPs) and then immersed the system in poly(dimethyldiallylammonium chloride) (PDDA) solution under ambient conditions. The treated substrates were then subjected to 3 nm-diameter CdTe NP solution at 100 °C for various periods of times. To increase the degree of deposition and to obtain CdTe QDs of various sizes, we performed the coating of the CdTe QDs through three heating cycles for 24, 12, or 6 h. The as-prepared (TiO2)3-PDDA-(QDCdTe)3-FTO electrodes were then used to fabricate (TiO2)3-PDDA-(QDCdTe)3-FTO QDSSCs employing 1-ethyl-3-methylimidazolium thiocyanate incorporating 1.0 M LiI and 0.1 M I2 as electrolytes. The heating treatment allows the QDSSCs to harvest energy at a higher efficiency in the visible region of solar light. As a result, the as-prepared QDSSCs feature a high energy conversion efficiency (η = 2.02%) and a high open-circuit photovoltage (Voc = 850 mV) at 100% sunlight (AM1.5, 100 mW/cm2).

AB - In this paper we describe the preparation of CdTe quantum dot-sensitized solar cells (QDSSCs). We coated FTO substrates with 21 nm-diameter TiO2 nanoparticles (NPs) and then immersed the system in poly(dimethyldiallylammonium chloride) (PDDA) solution under ambient conditions. The treated substrates were then subjected to 3 nm-diameter CdTe NP solution at 100 °C for various periods of times. To increase the degree of deposition and to obtain CdTe QDs of various sizes, we performed the coating of the CdTe QDs through three heating cycles for 24, 12, or 6 h. The as-prepared (TiO2)3-PDDA-(QDCdTe)3-FTO electrodes were then used to fabricate (TiO2)3-PDDA-(QDCdTe)3-FTO QDSSCs employing 1-ethyl-3-methylimidazolium thiocyanate incorporating 1.0 M LiI and 0.1 M I2 as electrolytes. The heating treatment allows the QDSSCs to harvest energy at a higher efficiency in the visible region of solar light. As a result, the as-prepared QDSSCs feature a high energy conversion efficiency (η = 2.02%) and a high open-circuit photovoltage (Voc = 850 mV) at 100% sunlight (AM1.5, 100 mW/cm2).

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A simple strategy for improving the energy conversion of multilayered CdTe quantum dot-sensitized solar cells

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