scholarly journals Improving the Performances of Perovskite Solar Cells via Modification of Electron Transport Layer

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 147 ◽  
Author(s):  
Mao Jiang ◽  
Qiaoli Niu ◽  
Xiao Tang ◽  
Heyi Zhang ◽  
Haowen Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Simple Method ◽  
Film Forming

The commonly used electron transport material (6,6)-phenyl-C61 butyric acid methyl ester (PCBM) for perovskite solar cells (PSC) with inverted planar structures suffers from properties such as poor film-forming. In this manuscript, we demonstrate a simple method to improve the film-forming properties of PCBM by doping PCBM with poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) as the electron transport layer (ETL), which effectively enhances the performance of CH3NH3PbI3 based solar cells. With 5 wt % F8BT in PCBM, the short circuit current (JSC) and fill factor (FF) of PSC both significantly increased from 17.21 ± 0.15 mA·cm−2 and 71.1 ± 0.07% to 19.28 ± 0.22 mA·cm−2 and 74.7 ± 0.21%, respectively, which led to a power conversion efficiency (PCE) improvement from 12.6 ± 0.24% to 15 ± 0.26%. The morphology investigation suggested that doping with F8BT facilitated the formation of a smooth and uniform ETL, which was favorable for the separation of electron-hole pairs, and therefore, an improved performance of PSC.

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 Investigation of the Effects of Various Organic Solvents on the PCBM Electron Transport Layer of Perovskite Solar Cells

Coatings ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 237
Author(s):  
Chih-Hung Tsai ◽  
Chia-Ming Lin ◽  
Cheng-Hao Kuei
Keyword(s):  
Surface Roughness ◽  
Solar Cells ◽  
Electron Transport ◽  
Organic Solvents ◽  
Electrochemical Impedance ◽  
Perovskite Solar Cells ◽  
Acid Methyl Ester ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
X Ray

In this study, four organic solvents including 1,2-dichlorobenzene (DCB), chlorobenzene (CB), methylbenzene (MB), and chloroform (CF) were used as solvents in the [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) electron transport layer (ETL) of perovskite solar cells (PSCs). This study observed the effects of various solvents on the surface morphology of the ETL by using an optical microscope (OM) and scanning electron microscope (SEM). The surface roughness, crystal structure, and surface element bonding of the ETL were observed using an atomic force microscope (AFM), X-ray diffractometer (XRD), and X-ray photoelectron spectroscope (XPS), respectively. The absorption spectrum of the perovskite layer was explored using an ultraviolet-visible (UV-Vis) spectrometer. The characteristics of the PSC device were analyzed in terms of its current density–voltage (J–V) curve, external quantum efficiency (EQE), and electrochemical impedance spectroscopy (EIS) measurements. The results showed that DCB is a solvent with a high boiling point, low vapor pressure, and high dielectric constant, and using DCB as the solvent for ETL, the uniformity, coverage, and surface roughness of the ETL showed better properties. The power conversion efficiency of the PSC in which DCB was used as the solvent achieved a value of 11.07%, which was higher than that of the PSCs in which other solvents were used.

scholarly journals Numerical simulation of perovskite solar cell with different material as electron transport layer using SCAPS-1D Software

2021 ◽  
Vol 24 (3) ◽  
pp. 341-347
Author(s):  
K. Bhavsar ◽  
◽  
P.B. Lapsiwala ◽  
Keyword(s):  
Numerical Simulation ◽  
Solar Cells ◽  
Solar Cell ◽  
Electron Transport ◽  
Perovskite Solar Cells ◽  
Acid Methyl Ester ◽  
Perovskite Solar Cell ◽  
Hole Transport ◽  
Transport Layer ◽  
Electron Transport Layer

Perovskite solar cells have become a hot topic in the solar energy device area due to high efficiency and low cost photovoltaic technology. However, their function is limited by expensive hole transport material (HTM) and high temperature process electron transport material (ETM) layer is common device structure. Numerical simulation is a crucial technique in deeply understanding the operational mechanisms of solar cells and structure optimization for different devices. In this paper, device modelling for different perovskite solar cell has been performed for different ETM layer, namely: TiO2, ZnO, SnO2, PCBM (phenyl-C61-butyric acid methyl ester), CdZnS, C60, IGZO (indium gallium zinc oxide), WS2 and CdS and effect of band gap upon the power conversion efficiency of device as well as effect of absorber thickness have been examined. The SCAPS 1D (Solar Cell Capacitance Simulator) has been a tool used for numerical simulation of these devices.

Enhanced efficiency and air-stability of NiOX-based perovskite solar cells via PCBM electron transport layer modification with Triton X-100

Nanoscale ◽  
2017 ◽  
Vol 9 (42) ◽  
pp. 16249-16255 ◽  
Author(s):  
Kisu Lee ◽  
Jaehoon Ryu ◽  
Haejun Yu ◽  
Juyoung Yun ◽  
Jungsup Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Acid Methyl Ester ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester ◽  
Triton X

In this work, a phenyl-C61-butyric acid methyl ester (PCBM) electron transport layer was modified with Triton X-100, and this improved the photovoltaic performance and air-stability of perovskite solar cells.

scholarly journals Facile Synthesis of Spherical TiO2 Hollow Nanospheres with a Diameter of 150 nm for High-Performance Mesoporous Perovskite Solar Cells

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 629
Author(s):  
Hoang Van Quy ◽  
Dang Hai Truyen ◽  
Sangmo Kim ◽  
Chung Wung Bark
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Synthesis Method ◽  
Short Circuit Current ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Hollow Nanospheres ◽  
Facile Synthesis

The electron transport layer (ETL) of organic–inorganic perovskite solar cells plays an important role in their power conversion efficiency (PCE). In this study, TiO2 hollow nanospheres with a diameter of 150 nm were prepared by a facile synthesis method. The synthesized TiO2 hollow nanospheres had a highly porous structure with a surface area of 85.23 m2 g−1, which is significantly higher than commercial TiO2 (P25) (54.32 m2 g−1), indicating that they can form an ideal mesoporous layer for Formamidinium iodide-based perovskite solar cells (PSCs). In addition, the nanospheres achieved a remarkable perovskite performance, and the average PCE increased from 12.87% to 14.27% with a short circuit current density of 22.36 mAcm−2, an open voltage of 0.95 V, and a fill factor of 0.65. The scanning electron microscopy images revealed that the enhanced PCE could be due to the improved carrier collection and transport properties of the nanosphere, which enabled efficient filtration of perovskite into the TiO2 mesoporous ETL. The TiO2 hollow nanospheres fabricated in this study show high potential as a high-quality ETL material for efficient (FAPbI3)0.97(MAPbBr3)0.03-based PSCs.

scholarly journals Effect of Absorber Layer Thickness on the Performance of Bismuth-Based Perovskite Solar Cells

2021 ◽  
Vol 55 (4) ◽  
pp. 354
Author(s):  
U.C. Obi ◽  
D.M. Sanni ◽  
A. Bello
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Layer Thickness ◽  
Perovskite Solar Cells ◽  
Acid Methyl Ester ◽  
Hole Transport ◽  
Absorber Layer ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Bismuth Perovskite

Theoretical study of methyl-ammonium bismuth halide perovskite solar cells, (CH3NH3)3Bi2I9, was carried out using a one-dimensional Solar Cell Capacitance Simulator (SCAPS-1D) software. The performance of the tested device architectures largely depends on the thickness of the absorbing layer, with the combination of electron transport, and hole transport layers. Thus, the bismuth perovskite absorber layer was optimized by varying the thickness and also, the thicknesses of the different charge-transport materials such as Spiro-OmeTAD, copper (I) oxide (Cu2O), and copper (I) iodide (CuI) as hole transport layer (HTL), and phenyl-C61-butyric acid methyl ester (PCBM), poly(3-hexylthiophene-2,5-diyl) (P3HT), zinc oxide, and titanium dioxide as electron transport layer (ETL). The best performance in terms of the power conversion efficiency (PCE) was recorded for the device with Cu2O as the HTL and ZnO as the ETL with the absorber layer thickness of 200 nm. The working temperature of the device was varied from 295 to 320 K and the effects of temperature on various device architectures were investigated. Results obtained indication that the efficiency of the bismuth perovskite solar cells can be improved by optimizing the thickness of the absorber layer and utilizing an appropriate combination of HTLs and ETLs. Keywords: methyl-ammonium bismuth perovskite, SCAPS, HTL, ETL, PCE.

scholarly journals The Investigation for Coating Method of Titanium Dioxide Layer in Perovskite Solar Cells

Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 236
Author(s):  
Pao-Hsun Huang ◽  
Chien-Wu Huang ◽  
Chih-Chieh Kang ◽  
Chia-Hsun Hsu ◽  
Shui-Yang Lien ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Spin Coating ◽  
Short Circuit ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Device Structure

The effect of conventional Perovskite solar cells (PSCs) by using different concentration and spin-coating speeds of titanium dioxide (TiO2) as an electron transport layer (ETL) was studied. The influence of TiO2 based on device structure: fluorine-doped tin oxide substrate/TiO2/Perovskite (CH3NH3PbI3)/2,2′,7,7′-Tetrakis[N,N-di(4-methoxyp phenyl)amino]-9,9′-spirobifluorene/silver, is also studied. The spin-coating speed is varied in a range from 1000 to 3000 rpm to get optimal performance of device. The optimized power conversion efficiency (PCE) of PSCs with original concentration (OC) and double concentration (DC) TiO2 is 8.74 and 9.93%, respectively. The reason is attributed to excellent absorption in shorter wavelength, compact characteristic, and suitable thickness of TiO2, leading to perfect short-circuit current density (Jsc), lower series resistance (Rs), and higher fill factor (FF) of 0.75. Besides, recombination of electron and hole is also decreased due to the compact feature, leading to higher open-circuit voltage (VOC) of 0.91 V.

scholarly journals Ultrathin and compact electron transport layer made from novel water-dispersed Fe3O4 nanoparticles to accomplish UV-stable perovskite solar cells

2021 ◽  
Author(s):  
Song Fang ◽  
Bo Chen ◽  
Bangkai Gu ◽  
Linxing Meng ◽  
Hao Lu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Electron Transport ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Perovskite Material ◽  
Main Factors ◽  
Induced Decomposition

UV induced decomposition of perovskite material is one of main factors to severely destroy perovskite solar cells for instability. Here we report a UV stable perovskite solar cell with a...

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