Efficient light harvesting with a nanostructured organic electron-transporting layer in perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 9281-9286 ◽  
Author(s):  
Li Wan ◽  
Wenxiao Zhang ◽  
Yulei Wu ◽  
Xiaodong Li ◽  
Changjian Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Harvesting ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Organic Electron ◽  
Electron Transporting Layer ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency

A nanostructured electron-transporting layer based on PFPDI was introduced into inverted perovskite solar cells. The light-harvesting efficiency and the short-circuit current density were greatly improved.

Theoretical study on the light harvesting efficiency of zinc porphyrin sensitizers for DSSCs

RSC Advances ◽  
2014 ◽  
Vol 4 (51) ◽  
pp. 26621-26634 ◽  
Author(s):  
Kadali Chaitanya ◽  
Xue-Hai Ju ◽  
B. Mark Heron
Keyword(s):  
Light Harvesting ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Zinc Porphyrin ◽  
Acceptor Group ◽  
Donor And Acceptor ◽  
Harvesting Efficiency ◽  
Light Harvesting Efficiency ◽  
Dft And Tddft Calculations

DFT and TDDFT calculations have been carried out to investigate the effect of donor and acceptor groups on the electronic properties of zinc-porphyrin sensitizers. The calculated results show that increasing the electron releasing strength of a meso-donor group opposite to a meso substituted acceptor group increases the light harvesting efficiency and short circuit current density.

scholarly journals The Influence of the Thickness of Compact TiO2 Electron Transport Layer on the Performance of Planar CH3NH3PbI3 Perovskite Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3295
Author(s):  
Andrzej Sławek ◽  
Zbigniew Starowicz ◽  
Marek Lipiński
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Transport Layer ◽  
Electron Transport Layer

In recent years, lead halide perovskites have attracted considerable attention from the scientific community due to their exceptional properties and fast-growing enhancement for solar energy harvesting efficiency. One of the fundamental aspects of the architecture of perovskite-based solar cells (PSCs) is the electron transport layer (ETL), which also acts as a barrier for holes. In this work, the influence of compact TiO2 ETL on the performance of planar heterojunction solar cells based on CH3NH3PbI3 perovskite was investigated. ETLs were deposited on fluorine-doped tin oxide (FTO) substrates from a titanium diisopropoxide bis(acetylacetonate) precursor solution using the spin-coating method with changing precursor concentration and centrifugation speed. It was found that the thickness and continuity of ETLs, investigated between 0 and 124 nm, strongly affect the photovoltaic performance of PSCs, in particular short-circuit current density (JSC). Optical and topographic properties of the compact TiO2 layers were investigated as well.

scholarly journals The Performance Improvement of Using Hole Transport Layer with Lithium and Cobalt for Inverted Planar Perovskite Solar Cell

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 354
Author(s):  
Shaoxi Wang ◽  
He Guan ◽  
Yue Yin ◽  
Chunfu Zhang
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Hole Mobility ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Planar Heterojunction

With the continuous development of solar cells, the perovskite solar cells (PSCs), whose hole transport layer plays a vital part in collection of photogenerated carriers, have been studied by many researchers. Interface transport layers are important for efficiency and stability enhancement. In this paper, we demonstrated that lithium (Li) and cobalt (Co) codoped in the novel inorganic hole transport layer named NiOx, which were deposited onto ITO substrates via solution methods at room temperature, can greatly enhance performance based on inverted structures of planar heterojunction PSCs. Compared to the pristine NiOx films, doping a certain amount of Li and Co can increase optical transparency, work function, electrical conductivity and hole mobility of NiOx film. Furthermore, experimental results certified that coating CH3NH3PbIxCl3−x perovskite films on Li and Co- NiOx electrode interlayer film can improve chemical stability and absorbing ability of sunlight than the pristine NiOx. Consequently, the power conversion efficiency (PCE) of PSCs has a great improvement from 14.1% to 18.7% when codoped with 10% Li and 5% Co in NiOx. Moreover, the short-circuit current density (Jsc) was increased from 20.09 mA/cm2 to 21.7 mA/cm2 and the fill factor (FF) was enhanced from 0.70 to 0.75 for the PSCs. The experiment results demonstrated that the Li and Co codoped NiOx can be a effective dopant to improve the performance of the PSCs.

Iodide management in formamidinium-lead-halide–based perovskite layers for efficient solar cells

Science ◽  
2017 ◽  
Vol 356 (6345) ◽  
pp. 1376-1379 ◽  
Author(s):  
Woon Seok Yang ◽  
Byung-Wook Park ◽  
Eui Hyuk Jung ◽  
Nam Joong Jeon ◽  
Young Chan Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Deep Level ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Small Cells ◽  
Iodide Ions

The formation of a dense and uniform thin layer on the substrates is crucial for the fabrication of high-performance perovskite solar cells (PSCs) containing formamidinium with multiple cations and mixed halide anions. The concentration of defect states, which reduce a cell’s performance by decreasing the open-circuit voltage and short-circuit current density, needs to be as low as possible. We show that the introduction of additional iodide ions into the organic cation solution, which are used to form the perovskite layers through an intramolecular exchanging process, decreases the concentration of deep-level defects. The defect-engineered thin perovskite layers enable the fabrication of PSCs with a certified power conversion efficiency of 22.1% in small cells and 19.7% in 1-square-centimeter cells.

scholarly journals Efficiency Improvement of MAPbI3 Perovskite Solar Cells Based on a CsPbBr3 Quantum Dot/Au Nanoparticle Composite Plasmonic Light-Harvesting Layer

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1471 ◽  
Author(s):  
Lung-Chien Chen ◽  
Ching-Ho Tien ◽  
Kuan-Lin Lee ◽  
Yu-Ting Kao
Keyword(s):  
Solar Cells ◽  
Surface Plasmon ◽  
Light Harvesting ◽  
Short Circuit ◽  
Resonance Effect ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Au Nanoparticle ◽  
Localized Surface Plasmon ◽  
Au Nps

We demonstrate a method to enhance the power conversion efficiency (PCE) of MAPbI3 perovskite solar cells through localized surface plasmon (LSP) coupling with gold nanoparticles:CsPbBr3 hybrid perovskite quantum dots (AuNPs:QD-CsPbBr3). The plasmonic AuNPs:QD-CsPbBr3 possess the features of high light-harvesting capacity and fast charge transfer through the LSP resonance effect, thus improving the short-circuit current density and the fill factor. Compared to the original device without Au NPs, a 27.8% enhancement in PCE of plasmonic AuNPs:QD-CsPbBr3/MAPbI3 perovskite solar cells was achieved upon 120 μL Au NP solution doping. This improvement can be attributed to the formation of surface plasmon resonance and light scattering effects in Au NPs embedded in QD-CsPbBr3, resulting in improved light absorption due to plasmonic nanoparticles.

scholarly journals Fabrication and Characterization of CH3NH3PbI3 Perovskite Solar Cells Added with Polysilanes

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Takeo Oku ◽  
Junya Nomura ◽  
Atsushi Suzuki ◽  
Hiroki Tanaka ◽  
Sakiko Fukunishi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Interfacial Structure ◽  
Perovskite Layer ◽  
Photovoltaic Properties ◽  
Coating Method

Effects of polysilane additions on CH3NH3PbI3 perovskite solar cells were investigated. Photovoltaic cells were fabricated by a spin-coating method using perovskite precursor solutions with polymethyl phenylsilane, polyphenylsilane, or decaphenyl cyclopentasilane (DPPS), and the microstructures were examined by X-ray diffraction and optical microscopy. Open-circuit voltages were increased by introducing these polysilanes, and short-circuit current density was increased by the DPPS addition, which resulted in the improvement of the photoconversion efficiencies to 10.46%. The incident photon-to-current conversion efficiencies were also increased in the range of 400~750 nm. Microstructure analysis indicated the formation of a dense interfacial structure by grain growth and increase of surface coverage of the perovskite layer with DPPS, and the formation of PbI2 was suppressed, leading to the improvement of photovoltaic properties.

scholarly journals Performance Enhancement of All-Inorganic Carbon-Based CsPbIBr2 Perovskite Solar Cells Using a Moth-Eye Anti-Reflector

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2726
Author(s):  
Wensheng Lan ◽  
Dazheng Chen ◽  
Qirui Guo ◽  
Baichuan Tian ◽  
Xiaoping Xie ◽  
...  
Keyword(s):  
Solar Cells ◽  
Inorganic Carbon ◽  
Performance Enhancement ◽  
Low Cost ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Wide Range ◽  
Carbon Based

All-inorganic carbon-based CsPbIBr2 perovskite solar cells (PSCs) have attracted increasing interest due to the low cost and the balance between bandgap and stability. However, the relatively narrow light absorption range (300 to 600 nm) limited the further improvement of short-circuit current density (JSC) and power conversion efficiency (PCE) of PSCs. Considering the inevitable reflectance loss (~10%) at air/glass interface, we prepared the moth-eye anti-reflector by ultraviolet nanoimprint technology and achieved an average reflectance as low as 5.15%. By attaching the anti-reflector on the glass side of PSCs, the JSC was promoted by 9.4% from 10.89 mA/cm2 to 11.91 mA/cm2, which is the highest among PSCs with a structure of glass/FTO/c-TiO2/CsPbIBr2/Carbon, and the PCE was enhanced by 9.9% from 9.17% to 10.08%. The results demonstrated that the larger JSC induced by the optical reflectance modulation of moth-eye anti-reflector was responsible for the improved PCE. Simultaneously, this moth-eye anti-reflector can withstand a high temperature up to 200 °C, and perform efficiently at a wide range of incident angles from 40° to 90° and under various light intensities. This work is helpful to further improve the performance of CsPbIBr2 PSCs by optical modulation and boost the possible application of wide-range-wavelength anti-reflector in single and multi-junction solar cells.

The N, N-Dimethylformamide Annealing for Enhanced Performance of Perovskite Solar Cells Fabricated in Ambient Air

NANO ◽  
2018 ◽  
Vol 13 (09) ◽  
pp. 1850102
Author(s):  
Xiude Yang ◽  
Debei Liu ◽  
Ping Li ◽  
Bo Wu ◽  
Haishen Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Solution Process ◽  
Cost Effective ◽  
Short Circuit Current ◽  
Ambient Air ◽  
Short Circuit Current Density ◽  
Coating Method ◽  
One Step

By adopting N, N-Dimethylformamide (DMF) atmosphere annealing at room temperature, planar perovskite solar cells with a p-i-n structure of ITO/PEDOT:PSS/Perovskite/PCBM/C[Formula: see text]/Al are fabricated by a simple one-step solution process in ambient air with humidity around 50%, and the influence of DMF atmosphere on perovskite solar cells (PSCs) is systematically investigated. Compared to the reference device without DMF reaction, the perovskite films treated by modest DMF annealing show a better distribution and a higher densification, and thus the power conversion efficiency (PCE), short circuit current density ([Formula: see text] and fill factor (FF) are increased by about 17%, 8% and 6%, respectively. This work displays the importance of solvent annealing for perovskite film prepared by the one-step spin-coating method, and possibly provides a simple and cost-effective way to efficiently fabricate PSCs in ambient air.

scholarly journals Cesium Doping for Performance Improvement of Lead(II)-acetate-Based Perovskite Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 363
Author(s):  
Min-Seok Han ◽  
Zhihai Liu ◽  
Xuewen Liu ◽  
Jinho Yoon ◽  
Eun-Cheol Lee
Keyword(s):  
Solar Cells ◽  
Performance Improvement ◽  
Fill Factor ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Perovskite Materials ◽  
Lead Source

Lead(II)-acetate (Pb(Ac)2) is a promising lead source for the preparation of organolead trihalide perovskite materials, which avoids the use of inconvenient anti-solvent treatment. In this study, we investigated the effect of cesium doping on the performance of Pb(Ac)2-based perovskite solar cells (PSCs). We demonstrate that the quality of the CH3NH3PbI3 perovskite film was improved with increased crystallinity and reduced pinholes by doping the perovskite with 5 mol% cesium. As a result, the power conversion efficiency (PCE) of the PSCs was improved from 14.1% to 15.57% (on average), which was mainly induced by the significant enhancements in short-circuit current density and fill factor. A PCE of 18.02% was achieved for the champion device of cesium-doped Pb(Ac)2-based PSCs with negligible hysteresis and a stable output. Our results indicate that cesium doping is an effective approach for improving the performance of Pb(Ac)2-based PSCs.

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