Carrier transport dynamics in Mn-doped CdSe quantum dot sensitized solar cells

Poudyal, Uma; Maloney, Francis Scott; Sapkota, Keshab R.; Wang, Wenyong

doi:10.1088/1361-6528/aa80d7

Cited by 15 publications

(7 citation statements)

References 42 publications

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“…The electron diffusion coefficient D n can be obtained from D n = d 2 /(2.35 τ tr ), where d is the thickness of the TiO 2 photoanode (ca. 150 nm) . The D n of the TiO 2 ‐HCl‐based device achieved under different light intensities are higher than the TiO 2 ‐based device (Figure c), signifying that the photogenerated electrons can diffuse readily and are collected rapidly from perovskite to the FTO substrate, which effectively suppresses the charge carrier recombination.…”

Section: Resultsmentioning

confidence: 94%

Unconventional Route to Oxygen‐Vacancy‐Enabled Highly Efficient Electron Extraction and Transport in Perovskite Solar Cells

et al. 2019

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The ability to effectively transfer photoexcited electrons and holes is an important endeavor towardachieving high-efficiency solar energy conversion. Now,asimple yet robust acid-treatment strategy is used to judiciously create an amorphous TiO 2 buffer layer intimately situated on the anatase TiO 2 surface as an electron-transport layer (ETL) for efficient electron transport. The facile acid treatment is capable of weakening the bonding of zigzag octahedral chains in anatase TiO 2 ,therebyshortening staggered octahedron chains to form an amorphous buffer layer on the anatase TiO 2 surface.S uch amorphous TiO 2-coated ETL possesses an increased electron density owingt ot he presence of oxygen vacancies,l eading to efficient electron transfer from perovskite to TiO 2 .C ompared to pristine TiO 2-based devices,the perovskite solar cells (PSCs) with acid-treated TiO 2 ETL exhibit an enhanced short-circuit current and power conversion efficiency.

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Section: Resultsmentioning

confidence: 94%

Unconventional Route to Oxygen‐Vacancy‐Enabled Highly Efficient Electron Extraction and Transport in Perovskite Solar Cells

et al. 2019

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“…150 nm). [33] The D n of the TiO 2 -HCl-based device achieved under different light intensities are higher than the TiO 2 -based device (Figure 4c), signifying that the photogenerated electrons can diffuse readily and are collected rapidly from perovskite to the FTO substrate,w hich effectively suppresses the charge carrier recombination. Consequently,t he TiO 2 -HCl-based device yields enhanced exterrnal quantum efficiency (EQE, Figure 4d)o ver the range of 400-750 nm.…”

Section: Angewandte Chemiementioning

confidence: 96%

Unconventional Route to Oxygen‐Vacancy‐Enabled Highly Efficient Electron Extraction and Transport in Perovskite Solar Cells

et al. 2019

View full text Add to dashboard Cite

The ability to effectively transfer photoexcited electrons and holes is an important endeavor towardachieving high-efficiency solar energy conversion. Now,asimple yet robust acid-treatment strategy is used to judiciously create an amorphous TiO 2 buffer layer intimately situated on the anatase TiO 2 surface as an electron-transport layer (ETL) for efficient electron transport. The facile acid treatment is capable of weakening the bonding of zigzag octahedral chains in anatase TiO 2 ,therebyshortening staggered octahedron chains to form an amorphous buffer layer on the anatase TiO 2 surface.S uch amorphous TiO 2 -coated ETL possesses an increased electron density owingt ot he presence of oxygen vacancies,l eading to efficient electron transfer from perovskite to TiO 2 .C ompared to pristine TiO 2 -based devices,the perovskite solar cells (PSCs) with acid-treated TiO 2 ETL exhibit an enhanced short-circuit current and power conversion efficiency.

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“…[296][297][298][299][300][301] The effect of dopant in QDs sensitizer has also been investigated in QDSCs. 107,185,191,203,246,[302][303][304][305][306][307][308][309][310][311][312] In 2012, Kamat and coworkers introduced the doping strategy in QDs and studied doping effect on the photovoltaic performance in QDSCs (Fig. 19).…”

Section: Alloyed Qdsmentioning

confidence: 99%

Quantum dot-sensitized solar cells

et al. 2018

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Quantum dot-sensitized solar cells (QDSCs) have emerged as a promising candidate for next-generation solar cells due to the distinct optoelectronic features of quantum dot (QD) light-harvesting materials, such as high light, thermal, and moisture stability, facilely tunable absorption range, high absorption coefficient, multiple exciton generation possibility, and solution processability as well as their facile fabrication and low-cost availability. In recent years, we have witnessed a dramatic boost in the power conversion efficiency (PCE) of QDSCs from 5% to nearly 13%, which is comparable to other kinds of emerging solar cells. Both the exploration of new QD light-harvesting materials and interface engineering have contributed to this fantastically fast improvement. The outstanding development trend of QDSCs indicates their great potential as a promising candidate for next-generation photovoltaic cells. In this review article, we present a comprehensive overview of the development of QDSCs, including: (1) the fundamental principles, (2) a history of the brief evolution of QDSCs, (3) the key materials in QDSCs, (4) recombination control, and (5) stability issues. Finally, some directions that can further promote the development of QDSCs in the future are proposed to help readers grasp the challenges and opportunities for obtaining high-efficiency QDSCs.

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Carrier transport dynamics in Mn-doped CdSe quantum dot sensitized solar cells

Cited by 15 publications

References 42 publications

Unconventional Route to Oxygen‐Vacancy‐Enabled Highly Efficient Electron Extraction and Transport in Perovskite Solar Cells

Unconventional Route to Oxygen‐Vacancy‐Enabled Highly Efficient Electron Extraction and Transport in Perovskite Solar Cells

Unconventional Route to Oxygen‐Vacancy‐Enabled Highly Efficient Electron Extraction and Transport in Perovskite Solar Cells

Quantum dot-sensitized solar cells

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