Porphyrin Dimers as Hole-Transporting Layers for High-Efficiency and Stable Perovskite Solar Cells

Chiang, Yu Hsien; Chou, Hsien-Hsin; Cheng, Wei Ting; Li, Yun Ru; Yeh, Chih-Hung; Chen, Peter

doi:10.1021/acsenergylett.8b00607

Cited by 67 publications

(45 citation statements)

References 47 publications

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“…Recently, porphyrins, existing widely in natural organisms, have attracted much attention owning to the following reasons: 1) porphyrin ligand can be easily modified through carboxyl or phosphate groups; 2) low‐cost molecular catalyst in improving the photo‐electrochemical cell performance; 3) unique optical and electrochemical properties by modifying the peripheral substituents and metal center; 4) high hole mobility and matched energy band …”

Section: Introductionmentioning

confidence: 99%

A Novel Charge Transfer Channel to Simultaneously Enhance Photocatalytic Water Splitting Activity and Stability of CdS

Ning

et al. 2019

Adv Funct Materials

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It is highly desirable to develop durable photocatalysts for efficiently boosting water splitting, but it is challenging for CdS to realize the expected result without using any hole sacrificial agents. Herein, improved photocatalytic hydrogen evolution and enhanced stability are simultaneously realized in the absence of any sacrificial agents by introducing Zinc 5-, 10-, 15-, 20-mesotetra (4-hydrazidephenyl) porphyrin (ZnTHPP) onto CdS nanosheets (CdS NSs). In this system (ZnTHPP/CdS NSs), a novel hole transfer channel is achieved by an internal chemical reaction using the functional group of acylhydrazine in ZnTHPP. Compared with CdS NSs, the ZnTHPP/CdS NSs exhibit excellent photostability (15 h) and efficient photocatalytic activity for pure water splitting (≈6.4 times). Furthermore, it is found that the rate constant for photogenerated holes is about 1.7 times higher than the pure CdS NSs under light irradiation. This suggests that the promising charge transfer channel can efficiently suppress charge recombination and photocorrosion of pure CdS NSs. The pattern via internal charge transfer channel not only can solve the stability of CdS based materials, but also design more semiconductors for efficient photocatalytic water splitting.

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Section: Introductionmentioning

confidence: 99%

A Novel Charge Transfer Channel to Simultaneously Enhance Photocatalytic Water Splitting Activity and Stability of CdS

Ning

et al. 2019

Adv Funct Materials

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“…2.4 eV), and low onset potential. Meanwhile,p orphyrins can be chosen as am ediator to maximize charge utilization as compared to previously reported photosensitizers, [28] since they show relatively high hole mobility [29] and it is possible to adjust their optical and electronic properties by modifying the peripheral and nonperipheral substituents and metal center. [30] In this study,anovel interface charge modulation system was designed, and the resulting configuration (R-BV/CoPy/ FN-H, Figure 1a;h erein, reduced BiVO 4 ,5 ,10,15,20-tetrakis(4-carboxyphenyl)porphyrin-Co,a nd FeNi(OH) x are denoted as R-BV,C oPy,a nd FN-H, respectively) presented ah igh photocurrent of 4.75 mA cm À2 at 1.23 V( versus the reversible hydrogen electrode (RHE)) under AM 1.5 G illumination (100 mW cm À2 ).…”

mentioning

confidence: 99%

An Efficient Strategy for Boosting Photogenerated Charge Separation by Using Porphyrins as Interfacial Charge Mediators

Ning

Zhang

et al. 2019

Angew Chem Int Ed

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Surface recombination at the photoanode/electrolyte junction seriously impedes photoelectrochemical (PEC) performance. Through coating of photoanodes with oxygen evolution catalysts, the photocurrent can be enhanced; however, current systems for water splitting still suffer from high recombination. We describe herein a novel charge transfer system designed with BiVO4 as a prototype. In this system, porphyrins act as an interfacial‐charge‐transfer mediator, like a volleyball setter, to efficiently suppress surface recombination through higher hole‐transfer kinetics rather than as a traditional photosensitizer. Furthermore, we found that the introduction of a “setter” can ensure a long lifetime of charge carriers at the photoanode/electrolyte interface. This simple interface charge‐modulation system exhibits increased photocurrent density from 0.68 to 4.75 mA cm−2 and provides a promising design strategy for efficient photogenerated charge separation to improve PEC performance.

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Section: Htms In Conventional Structures (N–i–p)mentioning

confidence: 99%

“…Thanks to these properties, the Y2 device exhibited a high efficiency of 16.60% than the spiro‐OMeTAD device. The same group also developed dimeric porphyrins to optimize the intermolecular interaction between porphyrin molecules to enhance hole mobility . They reported that a hole‐doped conjugated dimeric porphyrin is capable of spanning a hole polaron delocalization length of 17.9 Å in contrast to 13.9 Å for a monomer in a solution.…”

Section: Htms In Conventional Structures (N–i–p)mentioning

confidence: 99%

Hole Transport Materials in Conventional Structural (n–i–p) Perovskite Solar Cells: From Past to the Future

Kim

Choi

Kim

et al. 2020

Advanced Energy Materials

210

142

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With the application of organic–inorganic hybrid perovskites to liquid‐type solar cells, the unprecedented development of perovskite solar cells (Per‐SCs) has been boosted by the introduction of solid‐state hole transport materials (HTMs). The removal of liquid electrolyte has lead to improved efficiency and stability. Supported by high‐quality perovskite films, the certified efficiency of Per‐SCs has reached 25.2%. For Per‐SCs assembled in a conventional structure (n–i–p), the hole transport layer (HTL) plays an extra role in preventing the perovskite layer from external stimuli. In summary, the successful design and fabrication of the HTL must meet various requirements in terms of solubility, hole transport, recombination prevention, stability, and reproducibility, to name but a few. Many research strategies are focused on the development of high‐performance HTMs to meet such requirements. Such strategies for the development of HTMs employed in conventional n–i–p solar cells are reviewed herein. A vision of the future HTMs is proposed in this review based on the already proposed solutions and current trends.

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Porphyrin Dimers as Hole-Transporting Layers for High-Efficiency and Stable Perovskite Solar Cells

Cited by 67 publications

References 47 publications

A Novel Charge Transfer Channel to Simultaneously Enhance Photocatalytic Water Splitting Activity and Stability of CdS

A Novel Charge Transfer Channel to Simultaneously Enhance Photocatalytic Water Splitting Activity and Stability of CdS

An Efficient Strategy for Boosting Photogenerated Charge Separation by Using Porphyrins as Interfacial Charge Mediators

Hole Transport Materials in Conventional Structural (n–i–p) Perovskite Solar Cells: From Past to the Future

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