Preparation of PAH/Graphene Oxide Layer-by-Layer Films for Application on Solar Cells

2016 ◽  
Author(s):  
I. C. C. Assunção ◽  
P. A. Ribeiro ◽  
Q. Ferreira ◽  
M. Raposo ◽  
S. Sério
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Oxide Layer ◽  
Layer By Layer

scholarly journals Engineering of TiO2 or ZnO—Graphene Oxide Nanoheterojunctions for Hybrid Solar Cells Devices

Photonics ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 75
Author(s):  
Duarte Carreira ◽  
Paulo A. Ribeiro ◽  
Maria Raposo ◽  
Susana Sério
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Fossil Fuels ◽  
Electrical Characterization ◽  
Modern Society ◽  
Clean Energy ◽  
Zno Films ◽  
Layer By Layer ◽  
Glass Substrates ◽  
Rc Circuit

It is currently of huge importance to find alternatives to fossil fuels to produce clean energy and to ensure the energy demands of modern society. In the present work, two types of hybrid solar cell devices were developed and characterized. The photoactive layers of the hybrid heterojunctions comprise poly (allylamine chloride) (PAH) and graphene oxide (GO) and TiO2 or ZnO films, which were deposited using the layer-by-layer technique and DC-reactive magnetron sputtering, respectively, onto fluorine-doped tin oxide (FTO)-coated glass substrates. Scanning electron microscopy evidenced a homogeneous inorganic layer, the surface morphology of which was dependent on the number of organic bilayers. The electrical characterization pointed out that FTO/(PAH/GO)50/TiO2/Al, FTO/(PAH/GO)30/ZnO/Al, and FTO/(PAH/GO)50/ZnO/Al architectures were the only ones to exhibit a diode behavior, and the last one experienced a decrease in current in a low-humidity environment. The (PAH/GO)20 impedance spectroscopy study further revealed the typical impedance of a parallel RC circuit for a dry environment, whereas in a humid environment, it approached the impedance of a series of three parallel RC circuits, indicating that water and oxygen contribute to other conduction processes. Finally, the achieved devices should be encapsulated to work successfully as solar cells.

Stabilizing heterostructures of soft perovskite semiconductors

Science ◽  
2019 ◽  
Vol 365 (6454) ◽  
pp. 687-691 ◽  
Author(s):  
Yanbo Wang ◽  
Tianhao Wu ◽  
Julien Barbaud ◽  
Weiyu Kong ◽  
Danyu Cui ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Oxide Layer ◽  
Perovskite Solar Cells ◽  
Charge Carriers ◽  
Solution Processing ◽  
Processing Strategy ◽  
Maximum Power Point ◽  
Output Efficiency ◽  
Power Point

Here we report a solution-processing strategy to stabilize the perovskite-based heterostructure. Strong Pb–Cl and Pb–O bonds formed between a [CH(NH2)2]x[CH3NH3]1−xPb1+yI3 film with a Pb-rich surface and a chlorinated graphene oxide layer. The constructed heterostructure can selectively extract photogenerated charge carriers and impede the loss of decomposed components from soft perovskites, thereby reducing damage to the organic charge-transporting semiconductors. Perovskite solar cells with an aperture area of 1.02 square centimeters maintained 90% of their initial efficiency of 21% after operation at the maximum power point under AM1.5G solar light (100 milliwatts per square centimeter) at 60°C for 1000 hours. The stabilized output efficiency of the aged device was further certified by an accredited test center.

Improved Efficiency of Perovskite Solar Cells Using a Nitrogen-Doped Graphene-Oxide-Treated Tin Oxide Layer

2019 ◽  
Vol 12 (2) ◽  
pp. 2417-2423 ◽  
Author(s):  
Ji A Hong ◽  
Eui Dae Jung ◽  
Jae Choul Yu ◽  
Dae Woo Kim ◽  
Yun Seok Nam ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Oxide Layer ◽  
Tin Oxide ◽  
Perovskite Solar Cells ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

scholarly journals Simulating the thickness effect of the graphene oxide layer in CsPbBr3- based solar cells

2021 ◽  
Vol 8 (3) ◽  
pp. 035509
Author(s):  
Masood Mehrabian ◽  
Elham Norouzi Afshar ◽  
Sonya Asl Yousefzadeh
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Oxide Layer ◽  
Thickness Effect

scholarly journals Enhancing the Efficiency of a Forward Osmosis Membrane with a Polydopamine/Graphene Oxide Layer Prepared Via the Modified Molecular Layer-by-Layer Method

ACS Omega ◽  
2020 ◽  
Vol 5 (30) ◽  
pp. 18738-18745
Author(s):  
Chi-feng Lin ◽  
Li-han Chung ◽  
Guan-you Lin ◽  
Min-Chao Chang ◽  
Chi-Young Lee ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxide Layer ◽  
Molecular Layer ◽  
Forward Osmosis ◽  
Layer By Layer ◽  
Layer Method

Fabrication of layer-by-layer graphene oxide thin film on copper substrate by electrophoretic deposition

2020 ◽  
Vol 59 (12) ◽  
pp. 125001
Author(s):  
Nan Ye ◽  
Satoka Ohnishi ◽  
Mitsuhiro Okada ◽  
Kazuto Hatakeyama ◽  
Kazuhiko Seki ◽  
...  
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Electrophoretic Deposition ◽  
Copper Substrate ◽  
Oxide Thin Film ◽  
Layer By Layer ◽  
Layer Graphene
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