All-solution-processed PbS quantum dot solar modules

Jang, Ji-Hoon; Shim, Hyung Cheoul; Ju, Yeonkyeong; Song, Jee-Hun; An, Hyejin; Yu, Jong-Su; Kwak, Sun-Woo; Lee, Taik-Min; Kim, In-Young; Jeong, Sohee

doi:10.1039/c5nr01508a

Cited by 19 publications

(9 citation statements)

References 36 publications

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“…Thus, holes could not move from PbS to P3HT, leading to a reduction in photovoltaic performance of the system. Our energy alignment agrees well with recent experimental reports in which the measured HOMO P3HT /VBM PbS offset is only 0.1 (0.5) eV while the LUMO P3HT /CBM PbS offset is about 0.7 (1.2) eV . Furthermore, experimental result has shown a far low power conversion efficiency of P3HT/PbS system, reaching up to only 0.01–0.04% whereas that of P3HT/CdS is about 0.60–0.72% .…”

Section: Resultssupporting

confidence: 92%

Hybrid density functional study on the electronic structures and properties of P3HT‐PbS and P3HT‐CdS hybrid interface for photovoltaic applications

Nguyen

Shim

2018

J Comput Chem

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The efficiency of charge transport mainly depends on the interfacial energy level alignment between the conjugated polymer and the inorganic substrate. It provides an accurate understanding, predicting as well as controlling the optimal power conversion efficiency of various type of hybrid photovoltaic systems. In this article, we use hybrid functional (HSE06) to study the electronic structures and properties at the interface of poly(3‐hexylthiophene)(P3HT)/CdS and P3HT/PbS for solar cell applications. We found that the dangling bonds at the inorganic surface introduce in‐gap states and greatly reduce the device performance. We used pseudo‐hydrogen atoms as the passivation agent to remove the dangling bonds and eliminate the in‐gap states to construct the energy alignment at the hybrid interface. The calculated interfacial density of states reveal a better performance in P3HT/CdS, compared to P3HT/PbS. P3HT/CdS possesses a LUMOP3HT/CBMCdS and HOMOP3HT/VBMCdS energy offset large enough for sufficient exciton separation across the interface and prevents charge recombination. In contrast, the reason for low power conversion efficiency in P3HT/PbS lies on its HOMOP3HT/VBMPbS offset which is too small to break the exciton binding energy for charge separation. Moreover, we reported the dependency of the energy level alignment and open circuit voltage on the interfacial molecular orientations. Our DFT calculation can be used to predict candidate materials for the development of efficiency optoelectronic devices. © 2018 Wiley Periodicals, Inc.

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Section: Resultssupporting

confidence: 92%

Hybrid density functional study on the electronic structures and properties of P3HT‐PbS and P3HT‐CdS hybrid interface for photovoltaic applications

Nguyen

Shim

2018

J Comput Chem

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“…The development of these technologies laid the foundation for the roll-to-roll continuous manufacturing process of CQD inks in the future. Currently, Jang et al. (2015) had successfully achieved roll-to-roll CQDSC manufacturing on the flexible substrates with the SSLX method.…”

Section: Infrared Pbs Cqdsmentioning

confidence: 99%

PbS Colloidal Quantum Dot Inks for Infrared Solar Cells

et al. 2020

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Summary Infrared PbS colloidal quantum dot (CQD)-based materials receive significant attention because of its unique properties. The PbS CQD ink that originates from ligand exchange of CQDs is highly potential for efficient and stable infrared CQD solar cells (CQDSCs) using low-temperature solution-phase processing. In this review, we present a comprehensive overview of CQD inks for the development of efficient infrared solar cells, which can effectively harvest the photons from the infrared wavelength region of the solar spectrum, including the importance of infrared absorbers for solar cells, the unique properties of CQDs, ligand-exchange determined CQD inks, and related photovoltaic performance of CQDSCs. Finally, we present a brief conclusion, and the possible challenges and opportunities of the CQD inks are discussed in-depth to further develop highly efficient and stable infrared solar cells.

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“…Quantum dots (QDs) used in photoelectrochemical (PEC) cell, are expected to provide a better and efficient PEC system for production of hydrogen due to their exceptional extinction coefficient and tunable bandgap on account of quantum confinement effect . Large intrinsic dipole moment of these QDs has also shown to provide the rapid charge separation of photogenerated carriers .…”

Section: Introductionmentioning

confidence: 99%

Integrating PbS Quantum Dots with Hematite for Efficient Photoelectrochemical Hydrogen Production

Ikram

Dass

Shrivastav

et al. 2019

Physica Status Solidi (a)

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Hematite (α-Fe 2 O 3 ) thin film modified by PbS quantum dots (QDs) using successive ionic layer adsorption and reaction (SILAR) method is investigated as photoanode in PEC cell for different number of SILAR cycles for solar hydrogen production. Modified electrode shows a substantial increment in photocurrent density as well as in incident-photon-to-current-conversion efficiency. Maximum photocurrent density of 1.04 mA cm À2 at 0.75 V SCE À1 is exhibited by 6 SILAR cycles processed PbS QDs deposited below α-Fe 2 O 3 thin film. In depth analysis of the results of structural, optical, morphological, and photoelectrochemical characterization signifies that incorporating PbS QDs with α-Fe 2 O 3 allows higher visible light absorption along with favorable change in morphology. Further, improved photoelectrochemical performance has also been convinced by higher open circuit potential and more negative flat band potential of the sensitized samples.

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All-solution-processed PbS quantum dot solar modules

Cited by 19 publications

References 36 publications

Hybrid density functional study on the electronic structures and properties of P3HT‐PbS and P3HT‐CdS hybrid interface for photovoltaic applications

Hybrid density functional study on the electronic structures and properties of P3HT‐PbS and P3HT‐CdS hybrid interface for photovoltaic applications

PbS Colloidal Quantum Dot Inks for Infrared Solar Cells

Integrating PbS Quantum Dots with Hematite for Efficient Photoelectrochemical Hydrogen Production

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