Single-crystalline TiO2 nanoparticles for stable and efficient perovskite modules

Ding, Yong; Ding, Bin; Kanda, Hiroyuki; Usiobo, Onovbaramwen Jennifer; Gallet, Thibaut; Yang, Zhenhai; Liu, Yan; Huang, Hao; Sheng, Jiang; Liu, Cheng; Yang, Yi; Queloz, Valentin I. E.; Zhang, Xianfu; Audinot, Jean-Nicolas; Redinger, Alex; Dang, Wei; Mosconic, Edoardo; Luo, Wen; Angelis, Filippo De; Wang, Mingkui; Dörflinger, Patrick; Armer, Melina; Schmid, Valentin; Wang, Rui; Brooks, Keith G.; Wu, Jihuai; Dyakonov, Vladimir; Yang, Guan–Jun; Dai, Songyuan; Dyson, Paul J.; Nazeeruddin, Mohammad Khaja

doi:10.1038/s41565-022-01108-1

Cited by 166 publications

(131 citation statements)

References 53 publications

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“…The emission peaks at 435 and 470 nm can be attributed to the recombination of generated electrons with surface oxygen vacancies and the charge transfer from Ti 3+ to the oxygen anion localized in Ti octahedron, respectively . Obviously, the PL intensity of TiO 2 is reduced greatly by CuInS 2 decoration and further suppressed after forming TiO 2 /CuInS 2 /Cu, with only a residual 29.7% compared to that of pure TiO 2 , indicating the lower recombination rate of photogenerated e – –h + pairs, consistent with the prolonged decay lifetimes, which are fitted from the time-resolved photoluminescence (TRPL) spectra , in Figure S2 and summarized in Table S1.…”

Section: Resultsmentioning

confidence: 72%

Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO₂ Photoanode via a p–n Heterojunction and the Plasmonic Effect

Cheng

et al. 2022

J. Phys. Chem. C

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Developing visible light-responding photoelectrocatalysts with higher efficiency is highly demanded and broadly concerned in terms of photoelectrochemical (PEC) water splitting. Here, we report that by constructing a TiO2/CuInS2 p–n junction and further decorating it with plasmonic Cu nanoparticles, the synthesized TiO2/CuInS2/Cu photoanodes show significantly enhanced visible light absorption and higher photoelectrocatalysis efficiency, benefiting from the joint influence of the built-in electric field and surface plasmonic resonance (SPR). Under >420 nm light irradiation, the photocurrent density is 2.36 mA/cm2 at 1.23 V vs reversible hydrogen electrode (RHE), enhanced by about 10 times than that of pure TiO2. Furthermore, the hydrogen production rate was enhanced from an undetectable level to 4.552 μmol/cm2/h. Our results exhibit that the strategy of a double-layer co-catalyst has promising applications in water splitting and other solar energy-conversion areas.

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Section: Resultsmentioning

confidence: 72%

Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO₂ Photoanode via a p–n Heterojunction and the Plasmonic Effect

Cheng

et al. 2022

J. Phys. Chem. C

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“…Most of the state‐of‐the‐art perovskite solar cells (PVSCs) use planar heterojunction structures, which are either the n‐i‐p (conventional) or the p‐i‐n (inverted) structure. [ 8‐13 ] The inverted PVSCs have been widely studied due to their simple fabrication process and suppressed hysteresis effect. [ 14‐16 ] The choice of hole transport layer (HTL) material is particularly critical for inverted PVSCs, which affects not only charge extraction but also perovskite crystal growth.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Polypropylene Glycol‐Modified Anode Interface for High‐Performance Perovskite Solar Cells^†

Yan

et al. 2022

Chin. J. Chem.

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Comprehensive Summary The surface properties and chemical interactions are critical for perovskite solar cells (PVSCs). In this work, we show that the polypropylene glycol (PPG) can simultaneously passivate the NiOx surface and grain boundaries of perovskite films, allowing more efficient charge transfer at the anode interface and reducing the recombination of PVSCs. As a result, the open‐circuit voltage (Voc) of MAPbI3 based inverted PVSCs increases from 1.087 V to 1.127 V, and the short‐circuit current density (Jsc) is increased from 20.87 mA·cm–2 to 22.32 mA·cm–2, thereby realizing the improvement of the device power conversion efficiency (PCE) from 18.34% to 20.12%. Moreover, the steady‐state output of the PVSCs is remarkably improved by incorporating PPG. Further analysis of surface properties suggests that part of the PPG at the interface can permeate into the precursor solution with the help of DMF solvent and remain in the perovskite layer to form a concentration gradient. The ether bond of PPG and the uncoordinated Pb2+ in the perovskite are coordinated to achieve passivation effects and improve device performance. Our work provides a rational strategy for the preparation of high‐performance PVSCs.

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“…[1][2][3] This could be related to the high absorption coefficient, high charge transfer phenomenon, and adjustable bandgap along with high charge diffusion length, which are all important requirements. [4][5][6] The efficiency of HPSCs has substantially increased from a low of 3.8% (in 2009) 7 to a veried 25.2% (in 2021), 8 which has encouraged researchers in the HPSC's future development. Typically, according to the direction of the photocurrent, the fundamental architecture of HPSCs can be categorized into conventional (n-i-p) and inverted (p-i-n) architectures.…”

Section: Introductionmentioning

confidence: 99%

Introduction of cadmium chloride additive to improve the performance and stability of perovskite solar cells

et al. 2022

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Single-crystalline TiO2 nanoparticles for stable and efficient perovskite modules

Cited by 166 publications

References 53 publications

Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO₂ Photoanode via a p–n Heterojunction and the Plasmonic Effect

Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO₂ Photoanode via a p–n Heterojunction and the Plasmonic Effect

Polypropylene Glycol‐Modified Anode Interface for High‐Performance Perovskite Solar Cells^†

Introduction of cadmium chloride additive to improve the performance and stability of perovskite solar cells

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Single-crystalline TiO2 nanoparticles for stable and efficient perovskite modules

Cited by 166 publications

References 53 publications

Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO2 Photoanode via a p–n Heterojunction and the Plasmonic Effect

Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO2 Photoanode via a p–n Heterojunction and the Plasmonic Effect

Polypropylene Glycol‐Modified Anode Interface for High‐Performance Perovskite Solar Cells†

Introduction of cadmium chloride additive to improve the performance and stability of perovskite solar cells

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Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO₂ Photoanode via a p–n Heterojunction and the Plasmonic Effect

Enhancing the Visible Light Photoelectrochemical Water Splitting of TiO₂ Photoanode via a p–n Heterojunction and the Plasmonic Effect

Polypropylene Glycol‐Modified Anode Interface for High‐Performance Perovskite Solar Cells^†