Recent Advances on Small Band Gap Semiconductor Materials (≤2.1 eV) for Solar Water Splitting

Catalysts, Год журнала: 2023, Номер 13(4), С. 728 - 728

Опубликована: Апрель 12, 2023

The conversion of solar energy into renewable H2 fuel via photoelectrochemical and photocatalytic water splitting approaches has attracted considerable attention due to its potential solve significant environmental issues. To achieve reasonable efficiency 10%, which is amenable the economic feasibility this technology, semiconductor materials, are main carrier for production, must fulfill several important criteria. One most criteria band gap material, should be low enough allow efficient absorption incident light. This because material fundamentally determines upper limit theoretical system. In work, recent advances in utilizing with a smaller than 2.1 eV instead simply-defined visible-light-responsive materials toward production from was reviewed.

Язык: Английский

---

Charge Trapping in Semiconductor Photocatalysts: A Time- and Space-Domain Perspective

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(13), С. 8787 - 8799

Опубликована: Март 23, 2024

Harnessing solar energy to produce value-added fuels and chemicals through photocatalysis techniques holds promise for establishing a sustainable environmentally friendly economy. The intricate dynamics of photogenerated charge carriers lies at the core photocatalysis. balance between trapping band-edge recombination has crucial influence on activity semiconductor photocatalysts. Consequently, regulation traps in photocatalysts becomes key optimizing their activities. Nevertheless, our comprehension trapping, compared that well-studied recombination, remains somewhat limited. This limitation stems from inherently heterogeneous nature both temporal spatial scales, which renders characterization formidable challenge. Fortunately, recent advancements time-resolved spectroscopy space-resolved microscopy have paved way considerable progress investigation manipulation trapping. In this Perspective, we focus with aim direct link photocatalytic To achieve this, begin by elucidating principles advanced spectroscopic such as femtosecond transient absorption microscopic methods, single-molecule fluorescence surface photovoltage microscopy. Additionally, provide an overview noteworthy research endeavors dedicated probing using time- techniques. Our attention is then directed toward achievements defect engineering. Finally, summarize Perspective discuss future challenges opportunities lie ahead field.

Язык: Английский

---

Engineering and Design of Halide Perovskite Photoelectrochemical Cells for Solar‐Driven Water Splitting

Advanced Functional Materials, Год журнала: 2024, Номер 34(46)

Опубликована: Июнь 25, 2024

Abstract Photoelectrochemical cells (PEC) use solar energy to generate green hydrogen by water splitting and have an integrated device structure. Achieving high solar‐to‐hydrogen conversion (STH) efficiency along with a long operational lifetime in these is crucial for the production of low‐cost as viable source. Several functional components, such photo absorber, charge transport, catalyst layers are interfaced form compact monolithic device. In this review, therefore, engineering design individual components cells, interplay between them, their interfaces discussed detail, factors determine overall performance cells. The main emphasis on halide perovskite (HP) absorbers, which emerged promising materials due superior optoelectronic properties. Recent advances development efficient stable perovskite‐based highlighted reviewed. catalysts effect pH supporting cations also examined. Finally, scientific challenges future directions designing photoelectrochemical discussed. This review can help researchers further advance technology toward commercial hydrogen.

Язык: Английский

---

Halide Perovskites for Photoelectrochemical Water Splitting and CO₂ Reduction: Challenges and Opportunities

ACS Catalysis, Год журнала: 2024, Номер 14(9), С. 6603 - 6622

Опубликована: Апрель 16, 2024

Photoelectrochemical water splitting and CO2 reduction provide an attractive route to produce solar fuels while reducing the level of emissions. Metal halide perovskites (MHPs) have been extensively studied for this purpose in recent years due their suitable optoelectronic properties. In review, we survey achievements field. After a brief introduction photoelectrochemical (PEC) processes, discussed properties, synthesis, application MHPs context. We also state-of-the-art findings regarding significant performance, developments addressing major challenges toxicity instability toward water. Efforts made replace toxic Pb with less materials like Sn, Ge, Sb, Bi. The stability has improved by using various methods such as compositional engineering, 2D/3D perovskite structures, surface passivation, use protective layers, encapsulation. last part, considering experience gained photovoltaic applications, provided our perspective future opportunities. place special emphasis on improvement challenge potential contribution machine learning identify most formulation desired

Язык: Английский

---

Lead-free halide perovskite hollow nanospheres to boost photocatalytic activity for CO2 reduction

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 338, С. 123024 - 123024

Опубликована: Июнь 21, 2023

Язык: Английский

---

Organolead Halide-Based Coordination Polymers: Intrinsic Stability and Photophysical Applications

Accounts of Chemical Research, Год журнала: 2023, Номер 56(4), С. 452 - 461

Опубликована: Янв. 31, 2023

ConspectusOrganolead halide-based photovoltaics are one of the state-of-the-art solar cell systems with efficiencies increasing to 25% over past decade, ascribed their high light-absorption coefficient, broad wavelength coverage, tunable band structure, and excellent carrier mobility. Indeed, these optical characteristics highly demanding in photocatalysis photoluminescence (PL), which also involve energy utilization charge transport. However, vast majority organolead halides ionically bonded structures susceptible degradation upon high-polarity protic molecules (e.g., water (vapor) alcohol), often inevitable many photochemical applications. Encapsulation is a commonly used stabilization approach by coating protective layers, avoiding direct contact between polar molecules. this may partially hinder light penetration inner hybrid halide materials, introduce new interface problems that important luminescent sensing. Therefore, developing intrinsically stable organometal hybrids major target for applications optoelectronic applications.In Account, recent research progress on synthesis coordination polymers variety photoactive described. Herein, we propose general strategy advance intrinsic stability crystalline materials using coordinating anionic organic linkers, occupy photophysical features analogous those perovskites. Unlike organoammonium cations as structures, structure-directing agents organocarboxylates) render well-defined metal-carboxylate motifs extended architectures spanning from low-dimensional (0D, 1D) high-dimensional cationic inorganic Pb-X-Pb (X = F-/Cl-/Br-/I-) sublattices. This family can endure chemically reactive environments wide range pH aqueous boiling condition, have been systematically investigated experimental studies theoretical calculations. Many chloride/bromide-based show air-stable, broadband self-trapped emission large Stokes shift color rendition, exhibiting absolute quantum yields 35-72%. Among them, porous frameworks blocks recognized rare class metal-organic (MOFs) constructed lead secondary building units (SBUs). They not only substantially higher light-harvesting carrier-transport properties than conventional metal oxide-based MOFs, but allow isoreticular modification regulate PL guest More importantly, combining characteristics, layered iodide polymer shows overall photocatalytic splitting without use any sacrificial agent under simulated sunlight illumination. Given choice structurally diverse organocarboxylate hope Account provides deep insights importance chemistry discovery expand

Язык: Английский

---

Sequential Growth of Cs3Bi2I9/BiVO4 Direct Z-Scheme Heterojunction for Visible-Light-Driven Photocatalytic CO2 Reduction

Transactions of Tianjin University, Год журнала: 2023, Номер 29(6), С. 462 - 472

Опубликована: Дек. 1, 2023

Язык: Английский

---

Recent Advances of Lead-Free Halide Perovskites: From Synthesis to Applications

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(28), С. 10267 - 10329

Опубликована: Янв. 1, 2024

The recent progress and development directions in lead-free perovskites are summarized from the perspective of device physics materials science.

Язык: Английский

---

Perovskite Paradigm Shift: A Green Revolution with Lead-Free Alternatives in Photocatalytic CO₂ Reduction

ACS Energy Letters, Год журнала: 2024, Номер 9(4), С. 1932 - 1975

Опубликована: Апрель 4, 2024

Carbon dioxide (CO2), an archetypal greenhouse gas, can be transformed into valuable fuels through photocatalysis, presenting auspicious avenue for combating global climate change and energy crisis. While halide perovskites have sparked substantial research interest, concerns over lead toxicity spurred exploration of their lead-free counterparts CO2 photoreduction. This comprehensive Review navigates the fundamentals reduction, delving basic principles, mechanisms, relevant operando techniques. It then introduces diverse structures (LFHPs), synthesis methodologies, intrinsic properties that render them suitable Subsequently, unfolds application modification strategies light-driven conversion, highlighting breakthroughs shedding light on potential mechanisms. Finally, current challenges to tailor LFHPs robust photocatalytic reduction are critically discussed, offering insights future in this realm. aims illuminate path toward sustainable bridging knowledge gaps inspiring innovations a greener carbon-neutral tomorrow.

Язык: Английский

---

Ligand-engineered Cu-based halide perovskite for highly efficient near-infrared photocatalytic CO2 reduction

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 352, С. 124048 - 124048

Опубликована: Апрель 21, 2024

Язык: Английский

---