scholarly journals Enhanced Optical Absorption in Perovskite/Si Tandem Solar Cells with Nanoholes Array

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Yawei Kuang ◽  
Yulong Ma ◽  
Debao Zhang ◽  
Qingzhu Wei ◽  
Shuchang Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Structural Parameters ◽  
Perovskite Solar Cells ◽  
Photocurrent Density ◽  
Absorption Efficiency ◽  
Absorption Enhancement ◽  
Tandem Solar Cells ◽  
High Absorption Coefficient ◽  
Silicon Based

Abstract Perovskite solar cells are used in silicon-based tandem solar cells due to their tunable band gap, high absorption coefficient and low preparation cost. However, the relatively large optical refractive index of bottom silicon, in comparison with that of top perovskite absorber layers, results in significant reflection losses in two-terminal devices. Therefore, light management is crucial to improve photocurrent absorption in the Si bottom cell. In this paper, nanoholes array filled with TiO2 is introduced into bottom cells design. By finite-difference time-domain methods, the absorption efficiency and photocurrent density in the range of 300–1100 nm has been analyzed, and the structural parameters have been also optimized. Our calculations show the photocurrent density which tends to be saturated with the increase in the height of the nanoholes. The absorption enhancement modes of photons at different wavelengths have been analyzed intuitively by the distribution of electric field. These results enable a viable and convenient route toward high efficiency design of perovskite/Si tandem solar cells.

scholarly journals Major Impediment to Highly Efficient, Stable and Low-Cost Perovskite Solar Cells

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 964 ◽  
Author(s):  
Yue Zhang ◽  
Haiming Zhang ◽  
Xiaohui Zhang ◽  
Lijuan Wei ◽  
Biao Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Carrier Mobility ◽  
High Efficiency ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Environmental Stability ◽  
Perovskite Materials ◽  
Hybrid Perovskite ◽  
Silicon Based ◽  
Major Impediment

Organic–inorganic hybrid perovskite solar cells (PSCs) have made immense progress in recent years, owing to outstanding optoelectronic properties of perovskite materials, such as high extinction coefficient, carrier mobility, and low exciton binding energy. Since the first appearance in 2009, the efficiency of PSCs has reached 23.3%. This has made them the most promising rival to silicon-based solar cells. However, there are still several issues to resolve to promote PSCs’ outdoor applications. In this review, three crucial aspects of PSCs, including high efficiency, environmental stability, and low-cost of PSCs, are described in detail. Recent in-depth studies on different aspects are also discussed for better understanding of these issues and possible solutions.

scholarly journals Computational Study of Inverted All-Inorganic Perovskite Solar Cells Based on CsPbIxBr3-X Absorber Layer with Band Gap of 1.78 eV

2020 ◽  
Author(s):  
Nahuel Martínez ◽  
Carlos Pinzón ◽  
Guillermo Casas ◽  
Fernando Alvira ◽  
Marcelo Cappelletti
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
High Efficiency ◽  
Defect Density ◽  
Computational Study ◽  
Perovskite Solar Cells ◽  
Absorber Layer ◽  
Inorganic Materials ◽  
Tandem Solar Cells ◽  
Inorganic Perovskite

All-inorganic perovskite solar cells (PSCs) with inverted p-i-n configuration have not yet reached the high efficiency achieved in the normal n-i-p architecture. However, the inverted all-inorganic PSC are more compatible with the fabrication of tandem solar cells. In this work, a theoretical study of all-inorganic PSCs with inverted structure ITO/HTL/CsPbI<sub>x</sub>Br<sub>3</sub>−x/ETL/Ag, has been performed by means of computer simulation. Four p‐type inorganic materials (NiO, Cu<sub>2</sub>O, CuSCN and CuI) and three n-type inorganic materials (ZnO, TiO<sub>2</sub> and SnO<sub>2</sub>) were used as hole and electron transport layers (HTL and ETL), respectively. A band gap of 1.78 eV was used for the CsPbI x Br<sub>3</sub>−x perovskite layer. The simulation results allow identifying that CuI and ZnO are the most appropriate materials as HTL and ETL, respectively. Additionally, optimized values of thickness, acceptor density and defect density in the absorber layer have been obtained for the ITO/CuI/CsPbI x Br<sub>3</sub>−x /ZnO/Ag, from which, an optimum efficiency of 21.82% was achieved. These promising theoretical results aim to improve the manufacturing process of inverted all-inorganic PSCs and to enhance the performance of perovskite–perovskite tandem solar cells. <br>

scholarly journals Triple-cation low-bandgap perovskite thin-films for high-efficiency four-terminal all-perovskite tandem solar cells

2020 ◽  
Vol 8 (46) ◽  
pp. 24608-24619 ◽  
Author(s):  
Somayeh Moghadamzadeh ◽  
Ihteaz M. Hossain ◽  
The Duong ◽  
Saba Gharibzadeh ◽  
Tobias Abzieher ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Tandem Solar Cells ◽  
Low Bandgap ◽  
Photo Stability

Incorporating 2.5% Cs in FA0.8MA0.2Sn0.5Pb0.5I3 improves the photo-stability of the low-bandgap perovskite solar cells. The champion device with power conversion efficiency of 18.9% maintain 92% of its initial efficiency after 120 min MPP tracking.

scholarly journals Plasmon-Enhanced Light Absorption in (p-i-n) Junction GaAs Nanowire Solar Cells: An FDTD Simulation Method Study

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
E. A. Dawi ◽  
A. A. Karar ◽  
E. Mustafa ◽  
O. Nur
Keyword(s):  
Solar Cells ◽  
Light Absorption ◽  
Au Nanoparticles ◽  
High Efficiency ◽  
Simulation Method ◽  
Absorption Efficiency ◽  
Fdtd Simulation ◽  
Absorption Enhancement ◽  
Gaas Nanowire ◽  
Vertically Aligned

AbstractA finite-difference time-domain method is developed for studying the plasmon enhancement of light absorption from vertically aligned GaAs nanowire arrays decorated with Au nanoparticles. Vertically aligned GaAs nanowires with a length of 1 µm, a diameter of 100 nm and a periodicity of 165–500 nm are functionalized with Au nanoparticles with a diameter between 30 and 60 nm decorated in the sidewall of the nanowires. The results show that the metal nanoparticles can improve the absorption efficiency through their plasmonic resonances, most significantly within the near-bandgap edge of GaAs. By optimizing the nanoparticle parameters, an absorption enhancement of almost 35% at 800 nm wavelength is achieved. The latter increases the chance of generating more electron–hole pairs, which leads to an increase in the overall efficiency of the solar cell. The proposed structure emerges as a promising material combination for high-efficiency solar cells.

scholarly journals Enhanced Light Absorption by Facile Patterning of Nano-grating on Mesoporous TiO2 Photoelectrode for Cesium Lead Halide Perovskite Solar Cells

2020 ◽  
Author(s):  
Sungho Woo ◽  
Kang-Pil Kim ◽  
Soo Min Kwon ◽  
Wook Hyun Kim
Keyword(s):  
Solar Cells ◽  
Light Absorption ◽  
High Efficiency ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Absorption Efficiency ◽  
Wide Bandgap ◽  
Perovskite Material ◽  
Light Utilization ◽  
Halide Perovskite

Abstract CsPbIBr2, a type of cesium based all-inorganic halide perovskite (CsPe) composition, has been proposed as an alternative perovskite material against the mainstream organic–inorganic hybrid halide perovskite (HPe) materials owing to its exceptional humidity, thermal, temperature, and light stability. However, the low power conversion efficiency (PCE) due to its wide bandgap (2.05 eV) is an obstacle for its application in developing highly efficient solar cells. In this study, facile nanoimprinted one-dimensional grating nanopattern (1D GNP) formation on mesoporous TiO2 (mp-TiO2) photoelectrode has been introduced to improve the effective light utilization for enhancing the performance of CsPbIBr2 perovskite solar cells (PSCs). The 1D GNP structure on mp-TiO2 layer can not only increase the light absorption efficiency by diffracting the unabsorbed light into the mp-TiO2 and CsPbIBr2 active layer, but can also increase the charge separation and collection due to the enlarged interfacial contact area between the mp-TiO2 and CsPbIBr2 layers. Consequently, both current density (JSC) and fill factor (FF) of the fabricated cells were improved leading to over 20% improvement in their PCE. Thus, we conclude that this periodic grating structure, fabricated by simple solvent-assisted nanoimprinting, can play an important role in the realization of high-efficiency and low-cost Cs-based PSCs.

scholarly journals Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency

2021 ◽  
Vol 12 ◽  
pp. 4
Author(s):  
Ajay Singh ◽  
Alessio Gagliardi
Keyword(s):  
Surface Modification ◽  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Tandem Solar Cells ◽  
Tandem Cell ◽  
Cell Efficiency ◽  
The Impact

Inorganic–organic hybrid perovskites offer wide optical absorption, long charge carrier diffusion length, and high optical-to-electrical conversion, enabling more than 25% efficiency of single-junction perovskite solar cells. All-perovskite four-terminal (4T) tandem solar cells have gained great attention because of solution-processability and potentially high efficiency without a need for current-matching between subcells. To make the best use of a tandem architecture, the subcell bandgaps and thicknesses must be optimized. This study presents a drift-diffusion simulation model to find optimum device parameters for a 4T tandem cell exceeding 33% of efficiency. Optimized subcell bandgaps and thicknesses, contact workfunctions, charge transport layer doping and perovskite surface modification are investigated for all-perovskite 4T tandem solar cells. Also, using real material and device parameters, the impact of bulk and interface traps is investigated. It is observed that, despite high recombination losses, the 4T device can achieve very high efficiencies for a broad range of bandgap combinations. We obtained the best efficiency for top and bottom cell bandgaps close to 1.55 eV and 0.9 eV, respectively. The optimum thickness of the top and bottom cells are found to be about 250 nm and 450 nm, respectively. Furthermore, we investigated that doping in the hole transport layers in both the subcells can significantly improve tandem cell efficiency. The present study will provide the experimentalists an optimum device with optimized bandgaps, thicknesses, contact workfunctions, perovskite surface modification and doping in subcells, enabling high-efficiency all-perovskite 4T tandem solar cells.

scholarly journals Determination of Efficiency Parameters in tin Halide Perovskite Solar Cells

2019 ◽  
Vol 1 ◽  
pp. 294-300
Author(s):  
B A Ikyo ◽  
A F Ochai ◽  
A Itodo
Keyword(s):  
Solar Cells ◽  
Theoretical Calculations ◽  
Perovskite Solar Cells ◽  
High Carrier ◽  
Halide Perovskite ◽  
Balanced Model ◽  
High Absorption Coefficient ◽  
Silicon Based ◽  
High Absorption

Perovskite solar cells have gained significant attention in photovoltaic research. Just within a few years, the efficiencies of perovskite-based solar cells have been improved significantly to over 20% which makes them comparably efficient to silicon-based solar cells. The reason for such high recorded efficiencies are due to perovskites ease of processing, a high carrier diffusion length, low exciton binding energy and high absorption coefficient. Theoretical calculations were carried out based on the detailed balanced model on some Tin Halide Perovskite absorbers. For CH3 NH3 SnI3 , results obtained for V oc, Joc , FF and n are 1.14V, 34.4 mA/cm 2, 0.725and 5.56% respectively. For CH3 NH3 SnIBr2 values obtained for  Voc , J oc, FF are 1.37V, 24.03mA/cm2, 0.784 and 5.22% respectively. For CH3 NH3 SnI2 Br values obtained for Voc , Joc , FF are 1.38V, 20.04 mA/cm2, 0.810 and 4.69% Also for CH3 NH3 SnBr3 , results obtained for Voc , Joc , FF are 1.44V, 14.52mA/cm2, 0.881 and 3.21% respectively.

Carrier lifetimes of >1 μs in Sn-Pb perovskites enable efficient all-perovskite tandem solar cells

Science ◽  
2019 ◽  
Vol 364 (6439) ◽  
pp. 475-479 ◽  
Author(s):  
Jinhui Tong ◽  
Zhaoning Song ◽  
Dong Hoe Kim ◽  
Xihan Chen ◽  
Cong Chen ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Band Gap ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Polycrystalline Thin Film ◽  
Low Band Gap ◽  
Tandem Solar Cells ◽  
Carrier Lifetimes ◽  
Guanidinium Thiocyanate

All-perovskite–based polycrystalline thin-film tandem solar cells have the potential to deliver efficiencies of >30%. However, the performance of all-perovskite–based tandem devices has been limited by the lack of high-efficiency, low–band gap tin-lead (Sn-Pb) mixed-perovskite solar cells (PSCs). We found that the addition of guanidinium thiocyanate (GuaSCN) resulted in marked improvements in the structural and optoelectronic properties of Sn-Pb mixed, low–band gap (~1.25 electron volt) perovskite films. The films have defect densities that are lower by a factor of 10, leading to carrier lifetimes of greater than 1 microsecond and diffusion lengths of 2.5 micrometers. These improved properties enable our demonstration of >20% efficient low–band gap PSCs. When combined with wider–band gap PSCs, we achieve 25% efficient four-terminal and 23.1% efficient two-terminal all-perovskite–based polycrystalline thin-film tandem solar cells.

scholarly journals Computational Study of Inverted All-Inorganic Perovskite Solar Cells Based on CsPbIxBr3-X Absorber Layer with Band Gap of 1.78 eV

2020 ◽  
Author(s):  
Nahuel Martínez ◽  
Carlos Pinzón ◽  
Guillermo Casas ◽  
Fernando Alvira ◽  
Marcelo Cappelletti
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
High Efficiency ◽  
Defect Density ◽  
Computational Study ◽  
Perovskite Solar Cells ◽  
Absorber Layer ◽  
Inorganic Materials ◽  
Tandem Solar Cells ◽  
Inorganic Perovskite

All-inorganic perovskite solar cells (PSCs) with inverted p-i-n configuration have not yet reached the high efficiency achieved in the normal n-i-p architecture. However, the inverted all-inorganic PSC are more compatible with the fabrication of tandem solar cells. In this work, a theoretical study of all-inorganic PSCs with inverted structure ITO/HTL/CsPbI<sub>x</sub>Br<sub>3</sub>−x/ETL/Ag, has been performed by means of computer simulation. Four p‐type inorganic materials (NiO, Cu<sub>2</sub>O, CuSCN and CuI) and three n-type inorganic materials (ZnO, TiO<sub>2</sub> and SnO<sub>2</sub>) were used as hole and electron transport layers (HTL and ETL), respectively. A band gap of 1.78 eV was used for the CsPbI x Br<sub>3</sub>−x perovskite layer. The simulation results allow identifying that CuI and ZnO are the most appropriate materials as HTL and ETL, respectively. Additionally, optimized values of thickness, acceptor density and defect density in the absorber layer have been obtained for the ITO/CuI/CsPbI x Br<sub>3</sub>−x /ZnO/Ag, from which, an optimum efficiency of 21.82% was achieved. These promising theoretical results aim to improve the manufacturing process of inverted all-inorganic PSCs and to enhance the performance of perovskite–perovskite tandem solar cells. <br>

Polymer strategies for high-efficiency and stable perovskite solar cells

Nano Energy ◽  
2021 ◽  
Vol 82 ◽  
pp. 105712
Author(s):  
Sisi Wang ◽  
Zhipeng Zhang ◽  
Zikang Tang ◽  
Chenliang Su ◽  
Wei Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells
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