Enhancement of Perovskite Solar Cells Efficiency using N-Doped TiO2 Nanorod Arrays as Electron Transfer Layer

Zhang, Zhenlong; Li, Junfeng; Wang, Xiaoli; Qin, Jianqiang; Shi, Wenjia; Liu, Yuefeng; Gao, Huiping; Mao, Yanli

doi:10.1186/s11671-016-1811-0

Cited by 65 publications

(15 citation statements)

References 35 publications

(33 reference statements)

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“…Except these small differences, all the diffraction peaks are almost the same. In addition, the peaks of nitrides were not clearly observed in the patterns, probably due to the low amount of doping contents and also the homogeneous distribution of N in the sample 44,45 . The UV-Vis absorbance of the samples was investigated and Tauc plots were calculated to determine the band gap energy of the materials.…”

Section: Characterizationmentioning

confidence: 93%

Hydrogen–nitrogen plasma assisted synthesis of titanium dioxide with enhanced performance as anode for sodium ion batteries

Wang

Xiong

Cheng

et al. 2020

Sci Rep

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Sodium ion batteries are considered as one of the most promising energy storage devices as lithium ion batteries due to the natural abundance of sodium. tio 2 is very popular as anode materials for both lithium and sodium ion batteries because of the nontoxicity, safety and great stabilities. However, the low electronic conductivities and inferior sodium ion diffusion make it becoming a great challenge to develop advanced tio 2 anodes. Doping heteroatoms and incorporation of defects are believed to be great ways to improve the electrochemical performance of tio 2 anodes. In this work, commercial tio 2 (P25) nanoparticles was modified by hydrogen and nitrogen high-power plasma resulting in a disordered surface layer formation and nitrogen doping as well. the electrochemical performances of the samples as anode materials for sodium ion batteries was measured and the results indicated that after the hydrogen-nitrogen plasma treatment, H-N-TiO 2 electrode shows a 43.5% of capacity higher than the P-TiO 2 after 400 cycles long-term discharge/charge process, and the samples show a good long cycling stability as well, the Coulombic efficiencies of all samples are nearly 99% after 50 cycles which could be sustained to the end of long cycling. in addition, hydrogen-nitrogen plasma treated tio 2 electrode reached the stable high Coulombic efficiency earlier than the pristine material. High resolution teM images and XpS results indicate that there is a disordered surface layer formed after the plasma treatment, by which defects (oxygen vacancies) and N-doping are also introduced into the crystalline structure. All these contribute to the enhancement of the electrochemical performance. Rechargeable sodium ion batteries (SIBs) have been considered as the competitive alternative to lithium ion batteries because of some special merits, such as environment friendly, low cost and especially abundant alkali element widely distributed on earth 1-3. However, there is a big challenge that the ion radius of Na ions are ~ 70% larger than that of Li ions, so finding proper electrode materials which could provide big interstitial space to accommodate sodium ions and allow reversible and rapid ion insertion/extraction 3 is a challenging topic at the moment. Recently, many efforts have been made to explore advanced anode materials for sodium ion batteries. Firstly, carbonaceous material is an important choice which is very cheap however carbonaceous materials show undesired properties with low capacities and/or poor cycle performance 4. Secondly, Ti-based materials is a promising anode materials for sodium ion batteries, including Na 2 Ti 3 O 7 , Na 0.66 [Li 0.22 Ti 0.78 ]O 2 , Li 4 Ti 5 O 12 , and titanium dioxide (TiO 2) 5. Moreover, other materials based on alloying reactions (such as Sn, Sb, P and their compounds e.g. inter-metallics, oxides, sulfides, and phosphides) 6-10 and conversion reactions (oxides and sulfides, e.g. Fe 2 O 3 ,

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Section: Characterizationmentioning

confidence: 93%

Hydrogen–nitrogen plasma assisted synthesis of titanium dioxide with enhanced performance as anode for sodium ion batteries

Wang

Xiong

Cheng

et al. 2020

Sci Rep

View full text Add to dashboard Cite

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“…Figure 5 shows the Nyquist plots of PSCs Table S1. It is known that the EIS contains two circular arcs [37]. The high-frequency component is attributed to the charge transport resistance (R ct ), and the low-frequency component is mainly related to the recombination resistance (R rec ) [38].…”

Section: Resultsmentioning

confidence: 99%

In Situ-Formed and Low-Temperature-Deposited Nb:TiO2 Compact-Mesoporous Layer for Hysteresis-Less Perovskite Solar Cells with High Performance

Sun

Huang

et al. 2020

Nanoscale Res Lett

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Recently, reported perovskite solar cells (PSCs) with high power conversion efficiency (PCE) are mostly based on mesoporous structures containing mesoporous titanium oxide (TiO 2) which is the main factor to reduce the overall hysteresis. However, existing fabrication approaches for mesoporous TiO 2 generally require a high-temperature annealing process. Moreover, there is still a long way to go for improvement in terms of increasing the electron conductivity and reducing the carrier recombination. Herein, a facile one-step, in situ, and low-temperature method was developed to prepare an Nb:TiO 2 compact-mesoporous layer which served as both scaffold and electron transport layer (ETL) for PSCs. The Nb:TiO 2 compact-mesoporous ETL-based PSCs exhibit suppressed hysteresis, which is attributed to the synergistic effect of the increased interface surface area caused by nano-pin morphology and the improved carrier transportation caused by Nb doping. Such a high-quality compact-mesoporous layer allows the PSCs assembled using optimized 2% Nb-doped TiO 2 to achieve a remarkable PCE of 19.74%. This work promises an effective approach for creating hysteresis-less and high-efficiency PSCs based on compact-mesoporous structures with lower energy consumption and cost.

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“…The numerical fitting gives the device parameters, as listed in Supplementary Table S1. It is known that the EIS contains two circular arcs [31] . The high-frequency component is attributed to the charge transport resistance (R ct ), and the low-frequency component is mainly related to the recombination resistance (R rec ) [32] .…”

Section: Resultsmentioning

confidence: 99%

In-situ formed and low-temperature deposited Nb: TiO2 compact-mesoporous layer for hysteresis-less perovskite solar cells with high performance

Sun

Huang

et al. 2020

Preprint

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Recently, reported perovskite solar cells (PSCs) with high power conversion efficiency (PCE) are mostly based on mesoporous structures containing mesoporous titanium oxide (TiO 2 ) which is the main factor to reduce the overall hysteresis. However, existing fabrication approaches for mesoporous TiO 2 generally require a high temperature (>450 °C) annealing process. Moreover, there is still plenty of scope for improvement in terms of increasing the electron conductivity and reducing the carrier recombination. Herein, a facile one-step, in situ and low-temperature method was developed to prepare an Nb:TiO 2 compact-mesoporous layer to serve as both a scaffold and an electron transport layer (ETL) in PSCs. The Nb:TiO 2 compact-mesoporous layer based PSCs exhibit suppressed hysteresis, which is attributed to the synergistic effect of the large interface surface area caused by nano-pin morphology on the surface and the improved carrier transportation caused by the presence of Nb. Such a high-quality compact-mesoporous layer allows the PSC achieve a remarkable PCE of 19.74%. This work promises an effective approach for creating hysteresis-less and high-efficiency PSCs based on compact-mesoporous structures with lower energy consumption and cost.

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Enhancement of Perovskite Solar Cells Efficiency using N-Doped TiO2 Nanorod Arrays as Electron Transfer Layer

Cited by 65 publications

References 35 publications

Hydrogen–nitrogen plasma assisted synthesis of titanium dioxide with enhanced performance as anode for sodium ion batteries

Hydrogen–nitrogen plasma assisted synthesis of titanium dioxide with enhanced performance as anode for sodium ion batteries

In Situ-Formed and Low-Temperature-Deposited Nb:TiO2 Compact-Mesoporous Layer for Hysteresis-Less Perovskite Solar Cells with High Performance

In-situ formed and low-temperature deposited Nb: TiO2 compact-mesoporous layer for hysteresis-less perovskite solar cells with high performance

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