scholarly journals The development of Formamidinium lead Iodide based Perovskite Solar Cells: Efficiency and Stability

2022 ◽  
Author(s):  
Ziwei Zheng ◽  
Shiyu Wang ◽  
Yue Hu ◽  
Yaoguang Rong ◽  
Anyi Mei ◽  
...  
Keyword(s):  
Solar Cells ◽  
Binding Energy ◽  
Absorption Coefficient ◽  
Light Absorption ◽  
Carrier Lifetime ◽  
Perovskite Solar Cells ◽  
High Light ◽  
Lead Iodide ◽  
Perovskite Materials ◽  
Light Absorption Coefficient

Perovskite materials have been particularly eye-catching by virtue of its excellent properties, such as high light absorption coefficient, long carrier lifetime, low exciton binding energy and bipolarity transmission, etc. Limited...

scholarly journals Gradient engineered light absorption layer for enhanced carrier separation efficiency in perovskite solar cells

2020 ◽  
Author(s):  
Gaozhu Wu ◽  
Qing Zhu ◽  
Teng Zhang ◽  
Ziqi Zou ◽  
Weiping Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Structure ◽  
Light Absorption ◽  
Separation Efficiency ◽  
Perovskite Solar Cells ◽  
Thermal Evaporation Method ◽  
Absorption Layer ◽  
Perovskite Materials ◽  
High Efficient ◽  
Carrier Separation

Abstract Carrier transport behavior in perovskite light absorption layer significantly impacts the performance of perovskite solar cells (PSCs). In this work, reduced carrier recombination losses were achieved by the design of band structure in perovskite materials. An ultrathin (PbI 2 /PbBr 2 ) n film with a gradient thickness ratio was deposited as the lead halide precursor layer by thermal evaporation method, and PSCs with a gradient band structure in perovskite absorption layer were fabricated by a two-step method in ambient atmosphere. For comparison, PSCs with homogeneous perovskite materials of MAPbI 3 and MAPbI x Br 3-x were fabricated as well. It is found that the gradient type-II band structure greatly reduces the carrier lifetime and enhances the carrier separation efficiency. As a result, the PSCs with a gradient band structure exhibit an average power conversion efficiency of 17.5%, which is 1-2% higher than that of traditional PSCs. This work provides a novel method for developing high-efficient PSCs.

Sexithiophene-Based Photovoltaic Cells with High Light Absorption Coefficient via Crystalline Polymorph Control

2017 ◽  
Vol 121 (36) ◽  
pp. 19699-19704 ◽  
Author(s):  
Tetsuya Taima ◽  
Md. Shahiduzzaman ◽  
Takaaki Ishizeki ◽  
Kohei Yamamoto ◽  
Makoto Karakawa ◽  
...  
Keyword(s):  
Absorption Coefficient ◽  
Light Absorption ◽  
Photovoltaic Cells ◽  
High Light ◽  
Light Absorption Coefficient

High-temperature inverted annealing for efficient perovskite photovoltaics

CrystEngComm ◽  
2021 ◽  
Author(s):  
Fang Wen ◽  
Liuwen Tian ◽  
Wenfeng Zhang ◽  
Xiangqing Zhou ◽  
Puan Lin ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Temperature ◽  
Light Absorption ◽  
Perovskite Solar Cells ◽  
Single Junction ◽  
Perovskite Materials ◽  
Mixed Cation ◽  
Halide Perovskite

To date, mixed-cation lead mixed-halide perovskite materials represent the mainstream for serving as light absorption layers to fabricate single-junction perovskite solar cells (PSCs) as well as PSCs based tandem solar...

scholarly journals Gradient engineered light absorption layer for enhanced carrier separation efficiency in perovskite solar cells

2020 ◽  
Author(s):  
Gaozhu Wu ◽  
Qing Zhu ◽  
Teng Zhang ◽  
Ziqi Zou ◽  
Weiping Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Structure ◽  
Light Absorption ◽  
Separation Efficiency ◽  
Perovskite Solar Cells ◽  
Thermal Evaporation Method ◽  
Absorption Layer ◽  
Perovskite Materials ◽  
High Efficient ◽  
Carrier Separation

Abstract Carrier transport behavior in perovskite light absorption layer significantly impacts the performance of perovskite solar cells (PSCs). In this work, reduced carrier recombination losses were achieved by the design of band structure in perovskite materials. An ultrathin (PbI2/PbBr2)n film with a gradient thickness ratio was deposited as the lead halide precursor layer by thermal evaporation method, and PSCs with a gradient band structure in perovskite absorption layer were fabricated by a two-step method in ambient atmosphere. For comparison, PSCs with homogeneous perovskite materials of MAPbI3 and MAPbIxBr3-x were fabricated as well. It is found that the gradient type-II band structure greatly reduces the carrier lifetime and enhances the carrier separation efficiency. As a result, the PSCs with a gradient band structure exhibit an average power conversion efficiency of 17.5%, which is 1-2% higher than that of traditional PSCs. This work provides a novel method for developing high-efficient PSCs.

Ferroelectric domains in methylammonium lead iodide perovskite solar cells

2018 ◽  
Author(s):  
Holger Röhm ◽  
Tobias Leonhard ◽  
Michael J. Hoffmann ◽  
Alexander Colsmann
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Ferroelectric Domains ◽  
Methylammonium Lead Iodide

Fundamental Efficiency Limit of Lead Iodide Perovskite Solar Cells

2018 ◽  
Author(s):  
Luis Pazos-Outon ◽  
T. Patrick Xiao ◽  
Eli Yablonovitch
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Iodide

scholarly journals Effects of 5-Ammonium Valeric Acid Iodide as Additive on Methyl Ammonium Lead Iodide Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2512
Author(s):  
Daming Zheng ◽  
Changheng Tong ◽  
Tao Zhu ◽  
Yaoguang Rong ◽  
Thierry Pauporté
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Single Crystal Silicon ◽  
Mesoporous Structure ◽  
Valeric Acid ◽  
Electrical Impedance Spectroscopy ◽  
Lead Iodide ◽  
Crystal Silicon ◽  
Time Resolved ◽  
Hole Transporting

During the past decade, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has risen rapidly, and it now approaches the record for single crystal silicon solar cells. However, these devices still suffer from a problem of stability. To improve PSC stability, two approaches have been notably developed: the use of additives and/or post-treatments that can strengthen perovskite structures and the use of a nontypical architecture where three mesoporous layers, including a porous carbon backcontact without hole transporting layer, are employed. This paper focuses on 5-ammonium valeric acid iodide (5-AVAI or AVA) as an additive in methylammonium lead iodide (MAPI). By combining scanning electron microscopy (SEM), X-ray diffraction (XRD), time-resolved photoluminescence (TRPL), current–voltage measurements, ideality factor determination, and in-depth electrical impedance spectroscopy (EIS) investigations on various layers stacks structures, we discriminated the effects of a mesoscopic scaffold and an AVA additive. The AVA additive was found to decrease the bulk defects in perovskite (PVK) and boost the PVK resistance to moisture. The triple mesoporous structure was detrimental for the defects, but it improved the stability against humidity. On standard architecture, the PCE is 16.9% with the AVA additive instead of 18.1% for the control. A high stability of TiO2/ZrO2/carbon/perovskite cells was found due to both AVA and the protection by the all-inorganic scaffold. These cells achieved a PCE of 14.4% in the present work.

Particulate light absorption and the prediction of phytoplankton biomass and planktonic metabolism in northeastern Spanish aquatic ecosystems

2000 ◽  
Vol 57 (1) ◽  
pp. 25-33 ◽  
Author(s):  
C M Duarte ◽  
S Agustí ◽  
J Kalff
Keyword(s):  
Absorption Coefficient ◽  
Light Absorption ◽  
Aquatic Ecosystems ◽  
Coastal Lagoons ◽  
Strong Relationship ◽  
Community Respiration ◽  
Chl A ◽  
Light Absorption Coefficient ◽  
Alpine Rivers ◽  
Detrital Particles

Examination of particulate light absorption and microplankton metabolism in 36 northeastern Spanish aquatic ecosystems, ranging from alpine rivers to inland saline lakes and the open Mediterranean Sea, revealed the existence of general relationships between particulate light absorption and the biomass of phytoplankton and microplankton metabolism. The particulate absorption spectra reflected a dominance of nonphotosynthetic, likely detrital, particles in rivers and a dominance of phytoplankton in coastal lagoons. There was a strong relationship between the light absorbed by phytoplankton and the chlorophyll a (Chl a) concentration of the systems, which indicated an average (±SE) Chl a specific absorption coefficient of 0.0233 ± 0.0020 m2·mg Chl a-1 for these widely diverse systems. Chl a concentration was a weaker predictor of the total particulate light absorption coefficient, pointing to an important role of nonphytoplanktonic particles in light absorption. Gross production was very closely related to the light absorption coefficient of phytoplankton, whereas community respiration was strongly correlated with the total particulate light absorption coefficient, indicating the optical signatures of sestonic particles to be reliable predictors of planktonic biomass and metabolism in aquatic ecosystems.

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