Characterisation of electron transport and charge recombination using temporally resolved and frequency-domain techniques for dye-sensitised solar cells

2012 ◽  
Vol 31 (3) ◽  
pp. 420-467 ◽  
Author(s):  
Lu-Lin Li ◽  
Yu-Cheng Chang ◽  
Hui-Ping Wu ◽  
Eric Wei-Guang Diau
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Frequency Domain ◽  
Charge Recombination ◽  
Frequency Domain Techniques

Effect of TiO2 surface treatment on electron transfer in dye-sensitized solar cells

2022 ◽  
Author(s):  
Suping Jia ◽  
Tong Cheng ◽  
Huinian Zhang ◽  
Hao Wang ◽  
Caihong Hao
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
High Efficiency ◽  
Surface Defects ◽  
Dye Sensitized Solar Cells ◽  
Charge Recombination ◽  
Defect States ◽  
Transport Pathway ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Defect states in the TiO2 nanoparticles can cause severe charge recombination and poor electron-transport efficiency when used as a photoanode in dye-sensitized solar cells (DSSCs). Herein, we report a simple and practical way to passivate the surface defects of TiO2 through hydrothermal treating with acetic acid and H2SO4, introducing a high percentage of 101 facets and sulfonic acid functional groups on the TiO2 surface. A high efficiency of 8.12% has been achieved, which is 14% higher than that of untreated TiO2 under the same condition. EIS results prove that the multiacid-treated TiO2 can promote electron transport and reduce charge recombination at the interface of the TiO2 and electrolyte. This work provides an efficient approach to engineer the electron-transport pathway in DSSCs.

Implications of Trap-Assisted Nongeminate Charge Recombination on Time- and Frequency-Domain Photocurrent Degradation Signatures of Organic Solar Cells

2020 ◽  
Vol 124 (31) ◽  
pp. 16838-16848
Author(s):  
Ryan T. Grimm ◽  
Pranab Deb ◽  
David J. Walwark ◽  
Christian Viets ◽  
John K. Grey
Keyword(s):  
Solar Cells ◽  
Frequency Domain ◽  
Organic Solar Cells ◽  
Charge Recombination

scholarly journals Surface Passivation Using N-Type Organic Semiconductor by One-Step Method in Two-Dimensional Perovskite Solar Cells

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 933
Author(s):  
Helong Wang ◽  
Guanchen Liu ◽  
Chongyang Xu ◽  
Fanming Zeng ◽  
Xiaoyin Xie ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Surface Passivation ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Transport Layer ◽  
Environmental Stability ◽  
Electron Transport Layer ◽  
Two Dimensional ◽  
One Step

Surface passivation, which has been intensively studied recently, is essential for the perovskite solar cells (PSCs), due to the intrinsic defects in perovskite crystal. A series of chemical or physical methods have been published for passivating the defects of perovskites, which effectively suppressed the charge recombination and enhanced the photovoltaic performance. In this study, the n-type semiconductor of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) is dissolved in chlorobenzene (CB) for the surface passivation during the spin-coating process for depositing the two-dimensional (2D) perovskite film. This approach simplifies the fabrication process of 2D PSCs and benefits the film quality. As a result, the defects of perovskite film are effectively passivated by this method. A better perovskite/PCBM heterojunction is generated, exhibiting an increased film coverage and improved film morphology of PCBM. It is found that this technology results in an improved electron transporting performance as well as suppressed charge recombination for electron transport layer. As a result, PSCs based on the one-step formed perovskite/PCBM heterojunctions exhibit the optimized power conversion efficiency of 15.69% which is about 37% higher than that of regular perovskite devices. The device environmental stability is also enhanced due to the quality improved electron transport layer.

scholarly journals Surface passivation using n-type organic semiconductor in two-dimensional perovskite solar cells

2021 ◽  
Author(s):  
Xiaoyin Xie ◽  
Fanming Zeng ◽  
Helong Wang ◽  
guanchen Liu ◽  
Chongyang Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Surface Passivation ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Transport Layer ◽  
Environmental Stability ◽  
Electron Transport Layer ◽  
Two Dimensional

Surface passivation, which has been intensively studied recently, is essential for the perovskite solar cells (PSCs), due to the intrinsic defects in perovskite crystal. A series of chemical or physical methods have been published for passivating the defects of perovskite, which effectively suppressed the charge recombination and enhanced the photovoltaic performance. In this study, the n-type semiconductor of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) is dissolved in chlorobenzene (CB) for the surface passivation during the spin-coating process for depositing the two-dimensional (2D) perovskite film. This approach simplifies the fabrication process of 2D PSCs and benefits the film quality. As a result, the defects of perovskite film are effectively passivated by this method. A better perovskite/PCBM heterojunction is generated, exhibiting an increased film coverage and improved film morphology of PCBM. It is found that this technology results in an improved electron transporting performance as well as suppressed charge recombination for electron transport layer. As a result, PSCs based on the one-step formed perovskite/PCBM heterojunctions exhibit the optimized power conversion efficiency of 15.69% which is about 37% higher than that of regular perovskite devices. The device environmental stability is also enhanced due to the quality-improved electron transport layer.

Highly efficient perovskite solar cells based on a nanostructured WO3–TiO2core–shell electron transporting material

2015 ◽  
Vol 3 (17) ◽  
pp. 9051-9057 ◽  
Author(s):  
Khalid Mahmood ◽  
Bhabani S. Swain ◽  
Ahmad R. Kirmani ◽  
Aram Amassian
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Single Crystal ◽  
Fast Electron ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Core Shell ◽  
Shell Electron ◽  
Hybrid Perovskite ◽  
Fast Electron Transport

A novel core–shell nanostructured WO3is investigated in detail and shown to work successfully as an electron transporting material in hybrid perovskite solar cells. A thin TiO2shell reduces charge recombination while highly textured single-crystal WO3nanostructures promote fast electron transport leading to an efficiency above 11%.

Suppressing Interfacial Charge Recombination in Electron‐Transport‐Layer‐Free Perovskite Solar Cells to Give an Efficiency Exceeding 21 %

2020 ◽  
Vol 132 (47) ◽  
pp. 21166-21173
Author(s):  
Wu‐Qiang Wu ◽  
Jin‐Feng Liao ◽  
Jun‐Xing Zhong ◽  
Yang‐Fan Xu ◽  
Lianzhou Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Interfacial Charge

Enhancing electron transport via graphene quantum dot/SnO2 composites for efficient and durable flexible perovskite photovoltaics

2019 ◽  
Vol 7 (4) ◽  
pp. 1878-1888 ◽  
Author(s):  
Yu Zhou ◽  
Sisi Yang ◽  
Xuewen Yin ◽  
Jianhua Han ◽  
Meiqian Tai ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Solar Cells ◽  
Electron Transport ◽  
Low Temperature ◽  
Quantum Dot ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Graphene Quantum Dot ◽  
Interfacial Charge

Low-temperature processed GQDs and SnO2 nanoparticles composites (G@SnO2) have been prepared through a facile synthetic path. Facilitated electron transfer and suppressed interfacial charge recombination enable flexible perovskite solar cells with superb efficiency and excellent durability.

The cis-isomer performs better than the trans-isomer in porphyrin-sensitized solar cells: interfacial electron transport and charge recombination investigations

2015 ◽  
Vol 17 (31) ◽  
pp. 20134-20143 ◽  
Author(s):  
Liyang Luo ◽  
Ram B. Ambre ◽  
Sandeep B. Mane ◽  
Eric Wei-Guang Diau ◽  
Chen-Hsiung Hung
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Trans Isomer ◽  
Charge Recombination ◽  
Zinc Porphyrin ◽  
Sensitized Solar Cells ◽  
Cis Isomer ◽  
Better Than

Distinctive differences in the performance of DSSC devices fabricated from cis- and trans-isomers of a zinc porphyrin have been rationalized.

Sign in / Sign up

Export Citation Format

Share Document