scholarly journals Enhanced Perovskite Solar Cell Performance by Adding Magnesium Acetate Using Two-Step Spin-Coating Method

2021 ◽  
Vol 927 (1) ◽  
pp. 012001
Author(s):  
D A Yusra ◽  
N Mufti ◽  
A F Muyasaroh ◽  
E Latifah
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
Perovskite Solar Cells ◽  
Crystallization Rate ◽  
Lattice Parameter ◽  
Solar Simulator ◽  
Perovskite Layer ◽  
Solar Cell Performance ◽  
Coating Method ◽  
The Stability

Abstract The poor stability of perovskite materials is a problem of concern in commercialization. In this study, we investigated the doping of magnesium cations (Mg2+) in PbI2 to improve the stability and efficiency of perovskite solar cells. The doping effect of Mg2+ can increase the crystallization rate. The perovskite film fabricated structure consists of ITO/TiO2/perovskite/CuO. The fabrication method used is a two-stage spin coating. The concentrations of MgAc2 were used 0, 0.75, 1, and 1.25 mg ml−1. The characterizations used are XRD (X-Ray Diffraction), UV-Vis, SEM-EDX. While the performance of solar cells is measured using a solar simulator. The XRD pattern shows that the sample has a crystal structure of MAPbI3, PbI2, and CuO phases. The MAPbI3 lattice parameter increased with increasing Mg acetate concentration. The grain size of the perovskite layer is between 5 - 15 μm, with a thickness of about 30 μm. The efficiency of perovskite solar cells increases with the increasing concentration of MgAc2.

Highly efficient CsPbIBr2 perovskite solar cells with efficiency over 9.8% fabricated using a preheating-assisted spin-coating method

2019 ◽  
Vol 7 (32) ◽  
pp. 19008-19016 ◽  
Author(s):  
Yuxiao Guo ◽  
Xingtian Yin ◽  
Jie Liu ◽  
Wenxiu Que
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
Perovskite Solar Cells ◽  
High Quality ◽  
Spin Coating Method ◽  
Highly Efficient ◽  
Coating Method ◽  
One Step

An efficient and facile one-step spin-coating method assisted by a preheating process was applied for the fabrication of high-quality CsPbIBr2 films.

scholarly journals Improving the triple-cation perovskite solar cells by two-step deposition methods with perovskite seeds

2021 ◽  
Vol 2145 (1) ◽  
pp. 012028
Author(s):  
P Phiromruk ◽  
S Chatraphorn
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
Organic Cation ◽  
Perovskite Solar Cells ◽  
Deposition Process ◽  
Device Performance ◽  
Perovskite Layer ◽  
Cesium Ion ◽  
Ion Incorporation ◽  
Lead Halide

Abstract As of recent years, triple-cation perovskite solar cells have received immense attention due to its superior efficiency and better stability comparing to the classic single-cation perovskite solar cells such as MAPbI3 or FAPbI3. A triple-cation perovskite layer which has been used most recently is cesium-containing FAPbI3-based perovskite. One of decent approaches to fabricate the layer is spin-coating technique by using two-step deposition process in which mixed lead-halide and CsI precursor is firstly spin-coated onto a substrate, then organic cation solution is deposited on the lead-halide layer. In this work, the results show that the performance of the devices from this process is lower than expected that could be due to difficulty of cesium ion incorporation as a stabilizer for FAPbI3-based perovskite. Perovskite seeding growth is introduced to solve the problem where the process is slightly modified from conventional two-step deposition methods by adding small amount of perovskite seed precursor into PbI2 solution. The concentration of the perovskite seed in PbI2 solution was varied for 0, 7, 14 and 20% v/v. The highest average efficiency of 11.9% was obtained from 7% v/v seeding concentration. Furthermore, the device performance could be improved by using proper amount of chlorobenzene (CB) as an anti-solvent. The highest efficiency of 18.4% was achieved by using 30 µl of chlorobenzene.

scholarly journals Efficient Ag-Doped Perovskite Solar Cells Fabricated in Ambient Air

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1521
Author(s):  
Jiabin Hao ◽  
Zeming Wang ◽  
Huiying Hao ◽  
Guanlei Wang ◽  
Hongcheng Gao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Spin Coating ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Ambient Air ◽  
Nucleation Density ◽  
Perovskite Material ◽  
Coating Method ◽  
One Step ◽  
Improved Performance

So far, it is still a great challenge to prepare high efficiency organic–inorganic perovskite solar cells in ambient air. Specifically, moisture is easily combined with the perovskite material during the spin-coating process, which result in porous perovskite films with poor surface morphology. In this study, we investigated crystalline Ag-doped perovskite films by a one-step spin-coating method in air with 30–40% relative humidity (RH), in which ethyl acetate (EA) was used as antisolvent can absorb moisture in air to reduced nucleation density. More significantly, EA is a feasible and environmentally friendly solvent to replace highly toxic solvent. Moreover, 1.0% Ag-doped device shows a highest power conversion efficiency (PCE) of 14.36%. The improved performance is not only ascribed to the superior CH3NH3PbI3 film with high crystallinity but to the versatile tunability of energy band structure.

scholarly journals Stability of Non-Flexible vs. Flexible Inverted Bulk-Heterojunction Organic Solar Cells with ZnO as Electron Transport Layer Prepared by a Sol-Gel Spin Coating Method

Surfaces ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 319-327
Author(s):  
Mohammad-Reza Zamani-Meymian ◽  
Saeb Sheikholeslami ◽  
Milad Fallah
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Spin Coating ◽  
Bulk Heterojunction ◽  
Sol Gel ◽  
Electron Transport Layer ◽  
Spin Coating Method ◽  
Flexible Device ◽  
Coating Method ◽  
The Stability

In this research, inverted bulk heterojunction organic solar cells (BHJ OSC) with poly(3-hexylthiophene-2,5-diyl): (6,6)-phenyl C61 butyric acid methyl (P3HT:PCBM) as the active layer were fabricated by a sol-gel spin coating method using flexible PET and non-flexible glass as substrates. The power conversion efficiency (PCE) and the stability of the cells were investigated. According to the results, the non-flexible device showed higher short circuit current (Jsc) as well as open-circuit voltage (Voc) as compared to the flexible one so that 2.52% and 0.67% PCE for non-flexible and flexible cells were obtained, respectively. From the stability point of view, the non-flexible device maintained 51% of its initial efficiency after six weeks in a dark atmosphere, while it was about 19% for the flexible cell after four weeks. The most important reason for the higher PCE with the higher stability in the non-flexible cell can be attributed to its higher shunt resistance (Rsh) and better interlayer connections at the electron collector side.

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 Properties of Urea Added Perovskite Solar Cells according to ZrO2 Electronic Transport Layer Thicknesses

2021 ◽  
Vol 59 (1) ◽  
pp. 67-72
Author(s):  
Kwangbae Kim ◽  
Ohsung Song
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Light Transmittance ◽  
Base Layer ◽  
Electron Transport Layer ◽  
Solar Simulator ◽  
Perovskite Layer

The properties of 6 mM urea added perovskite solar cells (PSCs) according to ZrO2 electron transport layer (ETL) thicknesses of 204, 221, 254, and 281 nm were examined. A solar simulator was used to characterize the photovoltaic properties of the cell. Optical microscopy and field emission scanning electron microscope were used for the microstructure analysis, and a 3D profiler was used to analyze surface roughness. UV-VIS-NIR was used to analyze transmittance. From the photovoltaic analysis result, an energy conversion efficiency (ECE) of 14.93% was exhibited by the cell with a 221 nm-ZrO2 layer and added urea. From the analysis result of microstructure and surface roughness, 384 nm grain size was obtained through appropriate surface roughness of base layer for perovskite growth and the grain size coarsening by the urea under the 221 nm-ZrO2 condition. For this reason, ECE increased as the resistance of the grain boundary decreased. When the thickness of the ETL was increased above 250 nm-ZrO2, the ECE decreased due to the reduction in light transmittance, and light reaching the perovskite layer. Therefore, the ECE of PCS could be enhanced by selecting a ZrO2 layer with the appropriate thickness and the addition of urea.

Degradation mechanism of planar-perovskite solar cells: correlating evolution of iodine distribution and photocurrent hysteresis

2017 ◽  
Vol 5 (9) ◽  
pp. 4527-4534 ◽  
Author(s):  
Riski Titian Ginting ◽  
Mi-Kyoung Jeon ◽  
Kwang-Jae Lee ◽  
Won-Yong Jin ◽  
Tae-Wook Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Degradation Mechanism ◽  
Perovskite Solar Cells ◽  
Negative Effects ◽  
Perovskite Layer ◽  
Hole Transporting ◽  
Encapsulation Process ◽  
The Stability

The penetration of moisture/O2 into the perovskite solar cells (PSCs) causes shifts of iodine distribution within the perovskite layer and facilitates diffusion of iodine towards the hole transporting layer. Interestingly, these negative effects can be prevented by a simple encapsulation process and further prolong the stability of PSCs.

DMF as an Additive in a Two-Step Spin-Coating Method for 20% Conversion Efficiency in Perovskite Solar Cells

2017 ◽  
Vol 9 (32) ◽  
pp. 26937-26947 ◽  
Author(s):  
Jionghua Wu ◽  
Xin Xu ◽  
Yanhong Zhao ◽  
Jiangjian Shi ◽  
Yuzhuan Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Spin Coating ◽  
Perovskite Solar Cells ◽  
Spin Coating Method ◽  
Coating Method

scholarly journals Facile Solution Spin-Coating SnO2 Thin Film Covering Cracks of TiO2 Hole Blocking Layer for Perovskite Solar Cells

Coatings ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 314 ◽  
Author(s):  
Haiyan Ren ◽  
Xiaoping Zou ◽  
Jin Cheng ◽  
Tao Ling ◽  
Xiao Bai ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Spin Coating ◽  
High Efficiency ◽  
Carbon Film ◽  
Perovskite Solar Cells ◽  
Sno2 Thin Film ◽  
Blocking Layer ◽  
Perovskite Layer ◽  
Hole Blocking Layer

The hole blocking layer plays an important role in suppressing recombination of holes and electrons between the perovskite layer and fluorine-doped tin oxide (FTO). Morphological defects, such as cracks, at the compact TiO2 hole blocking layer due to rough FTO surface seriously affect performance of perovskite solar cells (PSCs). Herein, we employ a simple spin-coating SnO2 thin film solution to cover cracks of TiO2 hole blocking layer for PSCs. The experiment results indicate that the TiO2/SnO2 complementary composite hole blocking layer could eliminate the serious electrical current leakage existing inside the device, extremely reducing interface defects and hysteresis. Furthermore, a high efficiency of 13.52% was achieved for the device, which is the highest efficiency ever recorded in PSCs with spongy carbon film deposited on a separated FTO-substrate as composite counter electrode under one sun illumination.

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