scholarly journals Post-Annealing Effect on Optical and Electronic Properties of Thermally Evaporated MoOX Thin Films as Hole-Selective Contacts for p-Si Solar Cells

2021 ◽  
Author(s):  
Yuanwei Jiang ◽  
Shuangying Cao ◽  
Linfeng Lu ◽  
Guanlin Du ◽  
Yinyue Lin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Work Function ◽  
Electronic Properties ◽  
Crystalline Silicon ◽  
Annealing Treatment ◽  
Crystalline Silicon Solar Cells ◽  
Post Annealing ◽  
Si Solar Cells ◽  
Optical And Electronic Properties ◽  
Large Work

Abstract Owing to its large work function, MoOX has been widely used for hole-selective contact in both thin film and crystalline silicon solar cells. In this work, thermally evaporated MoOX films are employed on the rear sides of p-type crystalline silicon (p-Si) solar cells, where the optical and electronic properties of the MoOX films as well as the corresponding device performances are investigated as a function of post-annealing treatment. The MoOX film annealed at 100oC shows the highest work function and proves the best hole selectivity based on the results of energy band simulation and contact resistivity measurements. The full rear p-Si/MoOX/Ag contacted solar cells demonstrate the best performance with an efficiency of 19.19%, which is the result of the combined influence of MoOX’s hole selectivity and passivation ability.

scholarly journals Post-annealing Effect on Optical and Electronic Properties of Thermally Evaporated MoOX Thin Films as Hole-Selective Contacts for p-Si Solar Cells

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Yuanwei Jiang ◽  
Shuangying Cao ◽  
Linfeng Lu ◽  
Guanlin Du ◽  
Yinyue Lin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Work Function ◽  
Electronic Properties ◽  
Crystalline Silicon ◽  
Annealing Treatment ◽  
Crystalline Silicon Solar Cells ◽  
Post Annealing ◽  
Si Solar Cells ◽  
Optical And Electronic Properties ◽  
Large Work

AbstractOwing to its large work function, MoOX has been widely used for hole-selective contact in both thin film and crystalline silicon solar cells. In this work, thermally evaporated MoOX films are employed on the rear sides of p-type crystalline silicon (p-Si) solar cells, where the optical and electronic properties of the MoOX films as well as the corresponding device performances are investigated as a function of post-annealing treatment. The MoOX film annealed at 100 °C shows the highest work function and proves the best hole selectivity based on the results of energy band simulation and contact resistivity measurements. The full rear p-Si/MoOX/Ag-contacted solar cells demonstrate the best performance with an efficiency of 19.19%, which is the result of the combined influence of MoOX’s hole selectivity and passivation ability.

scholarly journals Efficient Recovery of Silver from Crystalline Silicon Solar Cells by Controlling the Viscosity of Electrolyte Solvent in an Electrochemical Process

2018 ◽  
Vol 8 (11) ◽  
pp. 2131
Author(s):  
Jun-Kyu Lee ◽  
Jin-Seok Lee ◽  
Young-Soo Ahn ◽  
Gi-Hwan Kang
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Methanesulfonic Acid ◽  
High Viscosity ◽  
Electrochemical Process ◽  
Cathodic Current ◽  
Crystalline Silicon Solar Cells ◽  
Si Solar Cells ◽  
Added Water ◽  
Efficient Recovery

We present electrowinning of silver (Ag) from crystalline silicon (c-Si) solar cells using a solution of methanesulfonic acid (MSA) as the electrolyte. Ag dissolved effectively in MSA because of its high solubility in MSA; however, the electrochemical recovery of Ag from MSA solutions was found to be inefficient because of the low mobility of Ag ions in MSA, owing to its high viscosity. Therefore, we decreased the viscosity of MSA by adding deionized (DI) water, as a possible method for enhancing the mobility of Ag ions. The concentrations of added DI water were 0, 1.1, 5.0, 9.3, and 20.8 M, respectively. Further, we performed cyclic voltammetry for each solution to calculate the diffusion coefficient using the Randles–Sevcik equation, and analyzed the viscosity of MSA solutions depending on the concentration of added water using a rheometer. The morphologies of the electrochemically recovered Ag particles changed with variations in the amount of the added water, from branch-like structures to dendritic structures with a decreasing size. Moreover, the cathodic current efficiency increased considerably with increasing concentration of the added DI water. Finally, we recovered Ag with >99.9% (3N) purity from c-Si solar cells by electrowinning, as determined by glow discharge mass spectrometry.

scholarly journals Recent Advances in and New Perspectives on Crystalline Silicon Solar Cells with Carrier-Selective Passivation Contacts

Crystals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 430 ◽  
Author(s):  
Cao Yu ◽  
Shengzhi Xu ◽  
Jianxi Yao ◽  
Shuwei Han
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Global Market ◽  
Crystalline Silicon Solar Cells ◽  
Novel Device ◽  
Si Solar Cells ◽  
Passivation Layers ◽  
Conversion Efficiencies

Crystalline silicon (c-Si) is the dominating photovoltaic technology today, with a global market share of about 90%. Therefore, it is crucial for further improving the performance of c-Si solar cells and reducing their cost. Since 2014, continuous breakthroughs have been achieved in the conversion efficiencies of c-Si solar cells, with a current record of 26.6%. The great efficiency boosts originate not only from the materials, including Si wafers, emitters, passivation layers, and other functional thin films, but also from novel device structures and an understanding of the physics of solar cells. Among these achievements, the carrier-selective passivation contacts are undoubtedly crucial. Current carrier-selective passivation contacts can be realized either by silicon-based thin films or by elemental and/or compound thin films with extreme work functions. The current research and development status, as well as the future trends of these passivation contact materials, structures, and corresponding high-efficiency c-Si solar cells will be summarized.

scholarly journals Broadband-sensitive Ni2+–Er3+ based upconverters for crystalline silicon solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55499-55506 ◽  
Author(s):  
Hom N. Luitel ◽  
Shintaro Mizuno ◽  
Toshihiko Tani ◽  
Yasuhiko Takeda
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Solar Irradiation ◽  
Silicon Solar Cells ◽  
Crystalline Silicon Solar Cells ◽  
Si Solar Cells ◽  
Limiting Efficiency

The newly developed CaZrO3:Er3+,Ni2+ broadband-sensitive upconverter utilizes 1060–1600 nm solar irradiation and can surpass the limiting efficiency of c-Si solar cells.

Firing and Contact Resistivity of Ag2O-Aided Pb-Free Silver Paste for Crystalline Silicon Solar Cells

2016 ◽  
Vol 847 ◽  
pp. 123-130 ◽  
Author(s):  
Ruo Bing Jiao ◽  
Tao Wu ◽  
Bo Ping Zhang ◽  
Liang Liang Li
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Electrical Contact ◽  
Decomposition Temperature ◽  
Contact Resistivity ◽  
Silicon Solar Cells ◽  
Silver Paste ◽  
Crystalline Silicon Solar Cells ◽  
Si Solar Cells ◽  
Ag Crystallites

The silver pastes containing Ag2O powder, Ag powder, α-terpineol, ethyl-cellulose and Pb-free glass were synthesized for crystalline silicon (c-Si) solar cells. It was found that α-terpineol assisted the decomposition of Ag2O powder and effectively lowered the decomposition temperature of Ag2O. Ag nanoparticles were produced during the decomposition of Ag2O, which helped to reduce the sintering temperature of the silver pastes. The Ag2O-aided silver pastes were fired on polycrystalline silicon solar cells at various temperatures, and large plate-shaped Ag crystallites appeared at the interfaces between the sintered pastes and the emitter, which ensured a good electrical contact. The contact resistivity of Ag2O-aided silver paste with an optimal ratio of Ag2O to Ag was lower than that of the paste with pure Ag powder. The lowest contact resistivity of Ag2O-aided Pb-free silver pastes sintered at 800°C was 0.029 Ω⋅cm2, which was close to that of commercial silver paste that contained Pb-based glass (0.026 Ω⋅cm2). The experimental data demonstrated that the addition of Ag2O reduced the contact resistance and promoted the sintering of Pb-free silver pastes, and Ag2O-aided Pb-free silver paste could be a promising candidate used for front-contact electrode of c-Si solar cells.

Deactivation Treatments of Silicon Solar Cells for Efficiency Recovery after Illumination Degradation

2009 ◽  
Vol 1210 ◽  
Author(s):  
Teng-Yu Wang ◽  
Terry Wang ◽  
Yen-Ju Chen ◽  
Chwung-Shan Kou ◽  
Chien-Hsun Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Annealing Treatment ◽  
Surface Damage ◽  
Silicon Solar Cells ◽  
Gas Treatment ◽  
Crystalline Silicon Solar Cells ◽  
Open Circular ◽  
Short Current Density ◽  
P Type

AbstractWe applied the deactivation treatments to p-type single crystalline silicon solar cells for deactivating the recombination-active boron-oxygen complex. The methods we used include thermal annealing treatment, capacitively couple plasma (CCP) treatment, and plasma immersion ion implantation (PIII) treatment. The results showed that all the deactivation treatments were working and the energy transfer efficiency (Eff) was thereby increased by more than 1% absolute compared to the degraded state base on the increasing of the open-circular voltage (Voc) and short-current density (Jsc). The CCP deactivated treatment got better efficiencies than PIII treatment because the PIII treatment damaged the surface of solar cells. After the forming gas treatment, the samples could be improved to close to the PIII samples due to the surface damage repairing. However, the increased efficiency could not be kept and would be degraded again after illumination.

Wet etching processes for recycling crystalline silicon solar cells from end-of-life photovoltaic modules

RSC Advances ◽  
2014 ◽  
Vol 4 (66) ◽  
pp. 34823-34829 ◽  
Author(s):  
Jongsung Park ◽  
Nochang Park
Keyword(s):  
Solar Cells ◽  
End Of Life ◽  
Crystalline Silicon ◽  
Wet Etching ◽  
Silicon Solar Cells ◽  
Crystalline Silicon Solar Cells ◽  
Photovoltaic Modules ◽  
Si Solar Cells

Chemical wafer recovering processes fabricate virgin-like c-Si wafers from degraded c-Si solar cells.

Novel Ag-doped glass frits for high-efficiency crystalline silicon solar cells

2017 ◽  
Vol 53 (46) ◽  
pp. 6239-6242 ◽  
Author(s):  
Sheng Yuan ◽  
Yongji Chen ◽  
Zongwei Mei ◽  
Ming-Jian Zhang ◽  
Zhou Gao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Contact Resistance ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Silicon Solar Cells ◽  
Crystalline Silicon Solar Cells ◽  
Si Solar Cells ◽  
Doped Glass

Novel Ag-doped glass frits remarkably improved the interface between bulk Ag and n-Si, which greatly reduced the contact resistance of c-Si solar cells.

Wafer-scale nanoconical frustum array crystalline silicon solar cells: promising candidates for ultrathin device applications

Nanoscale ◽  
2014 ◽  
Vol 6 (16) ◽  
pp. 9568-9573 ◽  
Author(s):  
Yunae Cho ◽  
Minji Gwon ◽  
Hyeong-Ho Park ◽  
Joondong Kim ◽  
Dong-Wook Kim
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Silicon Solar Cells ◽  
Wafer Scale ◽  
Crystalline Silicon Solar Cells ◽  
Si Solar Cells ◽  
Surface Optical ◽  
Device Applications

A high photocurrent of 36.96 mA cm−2was achieved for wafer-scaled crystalline Si solar cells with hexagonal nanoconical frustum arrays at the surface. Optical simulations showed that the expected photocurrent of 10 μm thick nanostructured cells could slightly exceed the Lambertian limit.

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