Matching Charge Extraction Contact for Infrared PbS Colloidal Quantum Dot Solar Cells (Small 1/2022)

Li, Mingyu; Chen, Shi‐Wu; Zhao, Xinzhao; Xiong, Kao; Wang, Bo; Shah, Usman Ali; Gao, Liang; Lan, Xinzheng; Zhang, Jianbing; Hsu, Hsien‐Yi; Tang, Jiang; Song, Haisheng

doi:10.1002/smll.202270005

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2024

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“…4f) were then employed to investigate the dynamics of charge carriers of these two kinds of devices. 45,46 The PbS-FLC devices exhibited a shorter carrier extraction time (t TPC ) of 0.37 ms and a longer recombination time (t TPV ) of 4.10 ms. In contrast, the t TPC and t TPV values of the control devices are 0.71 ms and 2.02 ms, respectively.…”

Section: Resultsmentioning

confidence: 99%

Ligand-customized colloidal quantum dots for high-performance optoelectronic devices

Xia,

Hu,

Wang

et al. 2024

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Ligand-customized colloidal quantum dots for high-performance optoelectronic devices

Xia,

Hu,

Wang

et al. 2024

J. Mater. Chem. C

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“…[ 1 , 2 , 3 , 4 , 5 , 6 ] The recent achievements of surface passivation, interface modulation, and device architecture have led to improved CQD solar cell performance, and enabled power conversion efficiencies (PCE) above 13% for lead sulfide (PbS) CQDs. [ 2 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]…”

Section: Introductionmentioning

confidence: 99%

Interfacial Heterojunction Enables High Efficient PbS Quantum Dot Solar Cells

Zhang,

Chen,

Cao

et al. 2024

Advanced Science

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Colloidal quantum dots (CQDs) are promising optoelectronic materials for solution‐processed thin film optoelectronic devices. However, the large surface area with abundant surface defects of CQDs and trap‐assisted non‐radiative recombination losses at the interface between CQDs and charge‐transport layer limit their optoelectronic performance. To address this issue, an interface heterojunction strategy is proposed to protect the CQDs interface by incorporating a thin layer of polyethyleneimine (PEIE) to suppress trap‐assisted non‐radiative recombination losses. This thin layer not only acts as a protective barrier but also modulates carrier recombination and extraction dynamics by forming heterojunctions at the buried interface between CQDs and charge‐transport layer, thereby enhancing the interface charge extraction efficiency. This enhancement is demonstrated by the shortened lifetime of carrier extraction from 0.72 to 0.46 ps. As a result, the resultant PbS CQD solar cells achieve a power‐conversion‐efficiency (PCE) of 13.4% compared to 12.2% without the heterojunction.

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Matching Charge Extraction Contact for Infrared PbS Colloidal Quantum Dot Solar Cells (Small 1/2022)

Cited by 2 publications

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Ligand-customized colloidal quantum dots for high-performance optoelectronic devices

Ligand-customized colloidal quantum dots for high-performance optoelectronic devices

Interfacial Heterojunction Enables High Efficient PbS Quantum Dot Solar Cells

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