In-situ surface patch-passivation via phosphorus oxygen bond for efficient PbS colloidal quantum dot infrared solar cells

Xiao, Qi; Xia, Bing; Liu, Peilin; Yang, Yang; Yang, Gaoyuan; Liu, Jing; Lu, Shuaicheng; Zhao, Xuezhi; Ge, Ciyu; Chen, Duo; Yang, Junrui; Liang, Guijie; Li, Kanghua; Lan, Xinzheng; Xiao, Zewen; Zhang, Jianbing; Gao, Liang; Tang, Jiang

doi:10.1016/j.solmat.2022.112040

Cited by 3 publications

(2 citation statements)

References 44 publications

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“…The sputtered ZnO device achieves a champion device with 10.41 and 0.85% PCE under AM 1.5G and 1100 nm filtered illumination, respectively, which is advanced among infrared PbS CQDs solar cells (Table S1). − These results also imply that sputtered ZnO effectively suppresses the interface recombination and improves device performance.…”

Section: Resultsmentioning

confidence: 92%

High-Performance Colloidal Quantum Dot Photodiodes via Suppressing Interface Defects

Liu

Yang

et al. 2023

ACS Appl. Mater. Interfaces

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PbS colloidal quantum dot (CQD) infrared photodiodes have attracted wide attention due to the prospect of developing cost-effective infrared imaging technology. Presently, ZnO films are widely used as the electron transport layer (ETL) of PbS CQDs infrared photodiodes. However, ZnO-based devices still suffer from the problems of large dark current and low repeatability, which are caused by the low crystallinity and sensitive surface of ZnO films. Here, we effectively optimized the device performance of PbS CQDs infrared photodiode via diminishing the influence of adsorbed H2O at the ZnO/PbS CQDs interface. The polar (002) ZnO crystal plane showed much higher adsorption energy of H2O molecules compared with other nonpolar planes, which could reduce the interface defects induced by detrimentally adsorbed H2O. Based on the sputtering method, we obtained the [002]-oriented and high-crystallinity ZnO ETL and effectively suppressed the adsorption of detrimental H2O molecules. The prepared PbS CQDs infrared photodiode with the sputtered ZnO ETL demonstrated lower dark current density, higher external quantum efficiency, and faster photoresponse compared with the sol–gel ZnO device. Simulation results further unveiled the relationship between interface defects and device dark current. Finally, a high-performance sputtered ZnO/PbS CQDs device was obtained with a specific detectivity of 2.15 × 1012 Jones at −3 dB bandwidth (94.6 kHz).

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Section: Resultsmentioning

confidence: 92%

High-Performance Colloidal Quantum Dot Photodiodes via Suppressing Interface Defects

Liu

Yang

et al. 2023

ACS Appl. Mater. Interfaces

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“…After adding DMSO, the dominant peak position corresponding to the Pb = S bond did not change, while the peak position corresponding to the Pb = O bond shifted to 138.38 and 143.18 eV, and the binding energy of the Pb = O bond was transferred to a lower energy. This is mainly due to the increased electron density of Pb atoms upon coordination, which is consistent with previous research results, further confirming the successful combination of DMSO as a patch ligand with PbS QDs. Moreover, it can be observed that the peak area proportion corresponding to the Pb = O bond in PbS-DMSO is significantly reduced compared to that in PbS QDs, indicating that DMSO has a certain passivation effect after binding to PbS QDs.…”

Section: Resultsmentioning

confidence: 99%

Linear Variable PbS-DMSO Filter with Potentiality for Hyperspectral Imaging Applications

Zhao,

Hou,

Bai

et al. 2024

ACS Appl. Nano Mater.

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Under the synergistic effect of Mie scattering and dimethyl sulfoxide (DMSO) ligand modification, a novel linear variable PbS-DMSO filter obtained by regulating the quantity and spacing of PbS-DMSO nanoparticles exhibits continuous variable filtering capability in the wide spectral range of 500−1100 nm, with significant slope and cutoff depth of filtering. The surface modification of PbS quantum dots (QDs) with DMSO drastically enhances the light absorption, thereby increasing the cutoff depth and slope of filtering. Moreover, the modification of PbS QDs with DMSO also results in the aggregation of PbS QDs into nanoparticles with an average diameter of ∼100 nm, providing conditions for the generation of the Mie scattering effect. Based on the Mie scattering effect, by regulating the quantity and spacing of PbS-DMSO nanoparticles, not only can the absorption characteristics of PbS-DMSO nanoparticles be further enhanced to improve the cutoff depth and slope of filtering but also the absorption wavelength range can be well adjusted to achieve arbitrary adjustment of the filtering spectral range. Combined with an image sensor, the spectral reconstruction ability of the linear variable PbS-DMSO filter is further demonstrated, which provides a research idea for breaking through the limitation of the number of sampling points in traditional array QD filters.

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Boosted light absorption by WO3-x/Ag/PbS heterostructure for high-efficiency interfacial solar steam generation

Wang,

et al. 2024

Journal of Colloid and Interface Science

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In-situ surface patch-passivation via phosphorus oxygen bond for efficient PbS colloidal quantum dot infrared solar cells

Cited by 3 publications

References 44 publications

High-Performance Colloidal Quantum Dot Photodiodes via Suppressing Interface Defects

High-Performance Colloidal Quantum Dot Photodiodes via Suppressing Interface Defects

Linear Variable PbS-DMSO Filter with Potentiality for Hyperspectral Imaging Applications

Boosted light absorption by WO3-x/Ag/PbS heterostructure for high-efficiency interfacial solar steam generation

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