Near-infrared absorption carboxylated chlorophyll-a derivatives for biocompatible dye-sensitized hydrogen evolution

Sun, Yuan; Chen, Gang; Zhan, Conghong; Kitao, Osamu; Tamiaki, Hitoshi; Sasaki, Shin‐ichi

doi:10.1016/j.ijhydene.2017.04.265

Cited by 38 publications

(24 citation statements)

References 40 publications

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“…Indeed, the M6 LUMO moved down below the TiO 2 conduction band edge energy level, no longer allowing exergonic electron injection to TiO 2 upon (HOMO → LUMO) optical transition, thus, explaining the decrease in PCE of M6 compared to M4. The energy levels of HOMO and LUMO of M2, M4, and M6 dyes are in the same range as those previously reported in the literature [31,33,52].…”

Section: Dft Calculationssupporting

confidence: 84%

In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

et al. 2020

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Chlorophyll a derivatives were integrated in “all solid-state” dye sensitized solar cells (DSSCs) with a mesoporous TiO2 electrode and 2′,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene as the hole-transport material. Despite modest power conversion efficiencies (PCEs) between 0.26% and 0.55% achieved for these chlorin dyes, a systematic investigation was carried out in order to elucidate their main limitations. To provide a comprehensive understanding of the parameters (structure, nature of the anchoring group, adsorption …) and their relationship with the PCEs, density functional theory (DFT) calculations, optical and photovoltaic studies and electron paramagnetic resonance analysis exploiting the 4-carboxy-TEMPO spin probe were combined. The recombination kinetics, the frontier molecular orbitals of these DSSCs and the adsorption efficiency onto the TiO2 surface were found to be the key parameters that govern their photovoltaic response.

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Section: Dft Calculationssupporting

confidence: 84%

In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

et al. 2020

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“…Photocatalytic solar energy conversion from light to hydrogen by Chl derivatives could be accomplished via three steps: 1) light absorption and photoelectron generation from the Chl derivative, 2) charge separation and electron transfer from the Chl derivative to cocatalyst (Pt), and 3) reduction of protons from water to H 2 on the surface of cocatalyst. In the initial stage of study for using semisynthetic chlorophyll‐ a derivative as photocatalyst, we found that Chl‐18 could be applicable as a sensitizer in a TiO 2 ‐based photocatalytic system for H 2 evolution with AA as the sacrificial reagent under visible light . The successful attempt proved the feasibility of applying Chl derivatives as photocatalyst on water‐splitting systems.…”

Section: Application Of Chlorophyll Derivatives As Photocatalyst For mentioning

confidence: 98%

Semisynthetic Chlorophyll Derivatives Toward Solar Energy Applications

Duan

Zhou

et al. 2020

Solar RRL

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Plenty of thin‐film solar cell technologies using organic materials have been developed to alleviate energy shortages. As developing devices for solar energy applications, artificial photosynthesis is a trend inspired from natural photosynthesis. Although the sophisticated system that exists in nature is fascinating, the development of photovoltaic devices focusing on the usage of natural chlorophylls has been quite limited, compared with the application of other counterparts such as artificial porphyrins or phthalocyanines. Herein, the development of semisynthetic chlorophyll derivatives as functional materials for solar cells are focused on. (Bacterio)chlorins possessing a carboxylic acid moiety as a binding site to semiconductors are synthesized to improve the efficiencies of dye‐sensitized solar cells, which are now leading to another application: photocatalysts for hydrogen evolution. In contrast, derivatives without a carboxy group can be applied to organic solar cells. As for the application for perovskite solar cells, self‐assembling aggregates of a kind of derivatives are proven to be suitable as hole‐transporting materials. In addition, a new type of solid‐state biosolar cells is proposed, in which chlorophyll derivatives act solely as the photoactive materials. This Report can enlarge the scope of advanced functional materials in the field of solar energy applications.

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“…Photocatalytic water splitting for hydrogen evolution is one of the sustainable approaches to convert solar energy into chemical energy. However, traditional semiconductor photocatalytic hydrogen production systems are moderately efficient and involve high costs [6] …”

Section: Introductionmentioning

confidence: 99%

“…However,t raditional semiconductor photocatalytic hydrogen pro-duction systems are moderately efficient and involveh igh costs. [6] Natural photosynthesis has evolved for billions of years to convert solar energy into chemical energy based on the lightharvesting antenna and charge-separatingr eactionc enters ystems.I nr ecenty ears, photocatalyticf uel productions ystems were inspired by the naturalZ -scheme in oxygenic photosynthesis. Artificial systems have been studied by combiningh alfreactions to produce H 2 and O 2 throught he photocatalytic decomposition of water.…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll‐Based Organic Heterojunction on Ti₃C₂T_x MXene Nanosheets for Efficient Hydrogen Production

Sun

Zheng

et al. 2021

Chemistry A European J

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The Z‐scheme process is a photoinduced electron‐transfer pathway in natural oxygenic photosynthesis involving electron transport from photosystem II (PSII) to photosystem I (PSI). Inspired by the interesting Z‐scheme process, herein a photocatalytic hydrogen evolution reaction (HER) employing chlorophyll (Chl) derivatives, Chl‐1 and Chl‐2, on the surface of Ti3C2Tx MXene with two‐dimensional accordion‐like morphology, forming Chl‐1@Chl‐2@Ti3C2Tx composite, is demonstrated. Due to the frontier molecular orbital energy alignments of Chl‐1 and Chl‐2, sublayer Chl‐1 is a simulation of PSI, whereas upper layer Chl‐2 is equivalent to PSII, and the resultant electron transport can take place from Chl‐2 to Chl‐1. Under the illumination of visible light (>420 nm), the HER performance of Chl‐1@Chl‐2@Ti3C2Tx photocatalyst was found to be as high as 143 μmol h−1 gcat−1, which was substantially higher than that of photocatalysts of either Chl‐1@Ti3C2Tx (20 μmol h−1 g−1) or Chl‐2@Ti3C2Tx (15 μmol h−1 g−1).

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Near-infrared absorption carboxylated chlorophyll-a derivatives for biocompatible dye-sensitized hydrogen evolution

Cited by 38 publications

References 40 publications

In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

Semisynthetic Chlorophyll Derivatives Toward Solar Energy Applications

Chlorophyll‐Based Organic Heterojunction on Ti₃C₂T_x MXene Nanosheets for Efficient Hydrogen Production

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Near-infrared absorption carboxylated chlorophyll-a derivatives for biocompatible dye-sensitized hydrogen evolution

Cited by 38 publications

References 40 publications

In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

In Depth Analysis of Photovoltaic Performance of Chlorophyll Derivative-Based “All Solid-State” Dye-Sensitized Solar Cells

Semisynthetic Chlorophyll Derivatives Toward Solar Energy Applications

Chlorophyll‐Based Organic Heterojunction on Ti3C2Tx MXene Nanosheets for Efficient Hydrogen Production

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Product

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Chlorophyll‐Based Organic Heterojunction on Ti₃C₂T_x MXene Nanosheets for Efficient Hydrogen Production