Photoelectrode for water splitting: Materials, fabrication and characterization

Wang, Zhiliang; Wang, Luyao

doi:10.1007/s40843-018-9240-y

Cited by 46 publications

(22 citation statements)

References 113 publications

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“…8d. The Tra-FA 0.9 MA 0.1 -based device showed a considerable drop, reflecting more facile decomposition of the absorber layer, due possibly to the presence of defects [53][54][55]. In the MCP-FA 0.92 MA 0.08based device, the stability curve remained linear with little slope throughout the observed period, which supports the notion of reduced defects, as indicated by the TRPL, PL, and EIS results discussed above.…”

Section: Spectroscopy (Eis) Insupporting

confidence: 72%

Advanced partial nucleation for single-phase FA0.92MA0.08PbI3-based high-efficiency perovskite solar cells

et al. 2019

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To date, extensive research has been carried out, with considerable success, on the development of highperformance perovskite solar cells (PSCs). Owing to its wide absorption range and remarkable thermal stability, the mixedcation perovskite FA x MA 1−x PbI 3 (formamidinium/methylammonium lead iodide) promises high performance. However, the ratio of the mixed cations in the perovskite film has proved difficult to control with precursor solution. In addition, the FA x MA 1−x PbI 3 films contain a high percentage of MA + and suffer from serious phase separation and high trap states, resulting in inferior photovoltaic performance. In this study, to suppress phase separation, a post-processing method was developed to partially nucleate before annealing, by treating the as-prepared intermediate phase FAI-PbI 2-DMSO (DMSO: dimethylsulfoxide) with mixed FAI/MAI solution. It was found that in the final perovskite, FA 0.92 MA 0.08 PbI 3 , defects were substantially reduced because the analogous molecular structure initiated ion exchange in the post-processed thin perovskite films, which advanced partial nucleation. As a result, the increased light harvesting and reduced trap states contributed to the enhancement of open-circuit voltage and short-circuit current. The PSCs produced by the post-processing method presented reliable reproducibility, with a maximum power conversion efficiency of 20.80% and a degradation of~30% for 80 days in standard atmospheric conditions.

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Section: Spectroscopy (Eis) Insupporting

confidence: 72%

Advanced partial nucleation for single-phase FA0.92MA0.08PbI3-based high-efficiency perovskite solar cells

et al. 2019

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“…Among them, the oxygen vacancy (V O ) is found to be another key issue in tailoring the performance of photoelectrodes 27 . The V O has a broad influence on every step of PEC process, including the light harvest, charge separation and transfer, and surface reaction 28‐32 . But the role of V O in PEC process has not been unambiguously explained.…”

Section: Introductionmentioning

confidence: 99%

Role of oxygen vacancy in metal oxide based photoelectrochemical water splitting

Wang

2021

EcoMat

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Photoelectrochemial (PEC) water splitting relies on the optoelectric property of the photoelectrodes. Oxygen vacancy (VO) has attracted increasing attention in tailoring photoelectrodes in the following three aspects: light harvest, charge separation and transfer, and surface reaction kinetics. Even though the VO may increase the recombination as a kind of defects in metal oxide based photoelectrode, a number of recent researches have revealed the beneficial feature of VO in PEC, which is controversial to the former understanding. Thus, a comprehensive analysis about the oxygen vacancy in the metal oxide photoelectrodes will be important for applying VO in achieving high PEC performance. Herein, we contribute a critical review on the role of oxygen vacancy including its formation mechanism, characterization methods, and the influence on the semiconductor and surface catalytic properties. The knowledge will help to clarify the effect of VO in terms of the structure‐performance relationship in the PEC process.

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“…Given the demanding four electron transfer process involved in the water oxidation reaction, the development of efficient WOCs remains a major step towards artificial photosynthesis [10]. The past decade has witnessed great interest in the design of single and multi-metal materials and of their underlying substrates as an efficient strategy to improve the overall catalytic activity and stability of such OER catalysts [11]. Along these lines, the synergistic effects involving layered hydroxides, spinels, amorphous oxides, and other tunable oxide-based materials have resulted in an exceptional enhancement of the catalytic performance [11].…”

Section: Introductionmentioning

confidence: 99%

“…The past decade has witnessed great interest in the design of single and multi-metal materials and of their underlying substrates as an efficient strategy to improve the overall catalytic activity and stability of such OER catalysts [11]. Along these lines, the synergistic effects involving layered hydroxides, spinels, amorphous oxides, and other tunable oxide-based materials have resulted in an exceptional enhancement of the catalytic performance [11]. Currently, some noble metals and their oxides, such as Ru, Ir, RuO 2 , and IrO 2 still remain the best catalysts for the OER, in both aqueous and acidic media.…”

Section: Introductionmentioning

confidence: 99%

Water Oxidation Catalysts: The Quest for New Oxide-Based Materials

Mavrokefalos

Patzke

2019

Inorganics

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The expected shortage of fossil fuels as well as the accompanying climate change are among the major challenges of the 21st century. A global shift to a sustainable energy landscape is, therefore, of utmost importance. Over the past few years, solar technologies have entered the energy market and have paved the way to replace fossil-based energy sources, in the long term. In particular, electrochemical solar-to-hydrogen technologies have attracted a lot of interest—not only in academia, but also in industry. Solar water splitting (artificial photosynthesis) is one of the most active areas in contemporary materials and catalysis research. The development of low-cost, efficient, and stable water oxidation catalysts (WOCs) remains crucial for artificial photosynthesis applications, because WOCs still represent a major economical and efficient bottleneck. In the following, we summarize recent advances in water oxidation catalysts development, with selected examples from 2016 onwards. This condensed survey demonstrates that the ongoing quest for new materials and informed catalyst design is a dynamic and rapidly developing research area.

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Photoelectrode for water splitting: Materials, fabrication and characterization

Cited by 46 publications

References 113 publications

Advanced partial nucleation for single-phase FA0.92MA0.08PbI3-based high-efficiency perovskite solar cells

Advanced partial nucleation for single-phase FA0.92MA0.08PbI3-based high-efficiency perovskite solar cells

Role of oxygen vacancy in metal oxide based photoelectrochemical water splitting

Water Oxidation Catalysts: The Quest for New Oxide-Based Materials

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