Single‐Atom Catalysis in Mesoporous Photovoltaics: The Principle of Utility Maximization

Shi, Yantao; Zhao, Chunyu; Wei, Haisheng; Guo, Jiahao; Liang, Shaobo; Wang, Aiqin; Zhang, Tao; Liu, Jingyue; Ma, Tingli

doi:10.1002/adma.201402978

Cited by 121 publications

(67 citation statements)

References 33 publications

(37 reference statements)

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“…In addition, the value of the starting point at the real part of the Nyquist plot corresponds to the series resistance Rs. [42][43] Moreover, plots measured at other bias voltages (0, 0.3, and 0.8 V) displayed the same regularity with that using 0.6 V. As shown in Figure 6b, WO x -based PSCs and TiO 2 -based PSCs exhibited a similar resistance R hf . As reported in the previous work, the charge transport resistance in HTM was relevant to the HTM layer.…”

Section: Page 2 Of 8 Acs Paragon Plus Environmentsupporting

confidence: 71%

Low-Temperature and Solution-Processed Amorphous WO_X as Electron-Selective Layer for Perovskite Solar Cells

Wang

Shi

Dong

et al. 2015

J. Phys. Chem. Lett.

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235

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The electron-selective layer (ESL) is an indispensable component of perovskite solar cells (PSCs) and is responsible for the collection of photogenerated electrons. Preparing ESL at a low temperature is significant for future fabrication of flexible PSCs. In this work, solution-processed amorphous WO(x) thin film was prepared facilely at low temperature and used as ESL in PSCs. Results indicated that a large quantity of nanocaves were observed in the WO(x) thin film. In comparison with the conventional TiO2 ESL, the WO(x) ESL exhibited comparable light transmittance but higher electrical conductivity. Compared with the TiO2-based PSCs, PSCs that use WO(x) ESL exhibited comparable photoelectric conversion efficiency, larger short-circuit current density, but lower open-circuit voltage. Electrochemical characterization indicated that the unsatisfied open-circuit voltage and fill factor were caused by the inherent charge recombination. This study demonstrated that this material is an excellent candidate for ESL.

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Section: Page 2 Of 8 Acs Paragon Plus Environmentsupporting

confidence: 71%

Low-Temperature and Solution-Processed Amorphous WO_X as Electron-Selective Layer for Perovskite Solar Cells

Wang

Shi

Dong

et al. 2015

J. Phys. Chem. Lett.

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235

128

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“…We chose mpg‐C 3 N 4 as the support, by virtue of its reported features of mesoporosity and high surface area, which are conducive to mass transfer, adsorption, and activation of reactants in catalysis . On the other hand, the characteristic N/C‐coordinating vacancies of mpg‐C 3 N 4 , formed by the unique tri‐s‐triazine structure provide the binding or interaction sites for single metal atoms . Mpg‐C 3 N 4 is prepared by thermally‐induced self‐condensation of cyanamide using colloidal silica as the template according to the literature (Figure S1, Supporting Information) .…”

Section: Single‐site Au Catalyzed Oxidation Of Various Organosilanesmentioning

confidence: 99%

Single‐Site Au^I Catalyst for Silane Oxidation with Water

et al. 2017

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Single-site Au anchored on mpg-C N (519 ppm Au loading) is developed as a highly active, selective, and stable catalyst for the oxidation of silanes with water with a turnover frequency as high as 50 200 h , far exceeding most known catalysts based on total gold content. Other hydrosilanes bearing unsaturated functional groups also lead to corresponding silanols under mild reaction conditions without formation of any side products in good or excellent yields. The spherical aberration correction electron microscopy and extended X-ray absorption fine structure measurements both confirm the atomic dispersion of Au atoms stabilized by mpg-C N . The coordination of the catalytically active Au by three nitrogen or carbon atoms in the tri-s-triazine repeating units not only prevents the Au atoms from aggregation, but also renders the surface Au highly active, which is completely different than homogeneous Au species.

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“…In 2014, we demonstrated the use of SAC of Pt 1 /FeO x in photovoltaics, as the counter electrode (CE) in dye‐sensitized solar cells (DSCs) 42. Compared with a conventional Pt CE (a sputtering Pt CE with 350 nm thickness), the SAC‐based CE exhibited much better activity and reversibility for the catalytic reduction of triiodide (I 3 − ) into iodide(I − ), as shown in Figure 8.…”

Section: The Power Of Single‐atom Catalysis and Recent Advancesmentioning

confidence: 99%

The Power of Single‐Atom Catalysis

2015

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Single‐atom catalysts (SACs) with individual and isolated metal atoms anchored to supports can act as active centers. Single‐atom catalysis is powerful and attractive because SACs have demonstrated distinguishing performances, such as drastic cost‐reduction, notable catalytic activity, and selectivity. Herein, we firstly introduce SAC, including the concept and some key issues in synthesis and catalysis. Then, the power of single‐atom catalysis is highlighted and the most recent advances are summarized. It is very encouraging that in recent years our understanding of SACs has increased, owing to substantial studies regarding sample preparation, characterization, evaluation, and also mechanistic interpretation. On the other hand, great challenges still remain for SACs.

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Single‐Atom Catalysis in Mesoporous Photovoltaics: The Principle of Utility Maximization

Cited by 121 publications

References 33 publications

Low-Temperature and Solution-Processed Amorphous WO_X as Electron-Selective Layer for Perovskite Solar Cells

Low-Temperature and Solution-Processed Amorphous WO_X as Electron-Selective Layer for Perovskite Solar Cells

Single‐Site Au^I Catalyst for Silane Oxidation with Water

The Power of Single‐Atom Catalysis

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Single‐Atom Catalysis in Mesoporous Photovoltaics: The Principle of Utility Maximization

Cited by 121 publications

References 33 publications

Low-Temperature and Solution-Processed Amorphous WOX as Electron-Selective Layer for Perovskite Solar Cells

Low-Temperature and Solution-Processed Amorphous WOX as Electron-Selective Layer for Perovskite Solar Cells

Single‐Site AuI Catalyst for Silane Oxidation with Water

The Power of Single‐Atom Catalysis

Contact Info

Product

Resources

About

Low-Temperature and Solution-Processed Amorphous WO_X as Electron-Selective Layer for Perovskite Solar Cells

Low-Temperature and Solution-Processed Amorphous WO_X as Electron-Selective Layer for Perovskite Solar Cells

Single‐Site Au^I Catalyst for Silane Oxidation with Water