Comprehensive rear surface passivation of superstrate Sb2Se3 solar cells via post-deposition selenium annealing treatments and the application of an electron blocking layer

2021 ◽  
Author(s):  
Giuk Jeong ◽  
Seunghwan Ji ◽  
Ji Woon Choi ◽  
Gihun Jung ◽  
Byungha Shin
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Grain Boundaries ◽  
Carrier Transport ◽  
Surface Passivation ◽  
Rear Surface ◽  
Blocking Layer ◽  
Electron Blocking Layer ◽  
Light Absorber ◽  
Post Deposition

Sb2Se3, a quasi-1D structured binary chalcogenide, has great potential as a solar cell light absorber owing to its anisotropic carrier transport and benign grain boundaries when the absorber layer is...

Sub-micron Optoelectronic Properties of Polycrystalline Solar Cell Materials

2005 ◽  
Vol 865 ◽  
Author(s):  
S. Smith ◽  
R. Dhere ◽  
T. Gessert ◽  
P. Stradins ◽  
T. Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Grain Boundaries ◽  
Surface Passivation ◽  
Near Field ◽  
Spectroscopic Properties ◽  
Optoelectronic Properties ◽  
Cdte Solar Cells ◽  
Cell Structures ◽  
Photo Response

AbstractGeneration, transport and collection of carriers in polycrystalline (PX) solar cells and their constituent materials are poorly understood, and significantly different than in their single-crystal counterparts. Recent theoretical and experimental results have put forth the expectation that grain boundaries in PX-solar cell materials such as CdTe and CuInGaSe2, either as-grown or after appropriate post-growth treatment, may have electronic properties which are advantageous to charge separation and solar cell operation[1-3]. However, a microscopic picture of the spatial variations in the optoelectronic properties of these materials is, for the most part, still lacking. The goal of the work reported here is to explore the optoelectronic and spectroscopic properties of grain-boundaries in these materials at the nanometer length-scale, via novel, high-resolution optical techniques. Towards this end, a significant enhancement in photo-response near grain boundaries in CdTe solar cells, consistent with models put forth in reference 2, was observed via near-field Optical Beam Induced Current (n-OBIC) [4]. A systematic μ-PL study of the effect of CdC12-treatment on recombination in CdTe/CdS solar cell structures of varying thickness directly examined the variation in optoelectronic properties at grain-boundaries in this material, revealing the grain-boundary and surface passivation effects of this important post-growth processing step. For comparison, we also studied the effects of SiNx post-growth treatment and annealing on the photo-response of PX-silicon solar cells using n-OBIC. These results and our most-recent n-OBIC measurements in CdTe and CuInGaSe2 solar cells are discussed.

scholarly journals Design of Grating Al2O3 Passivation Structure Optimized for High-Efficiency Cu(In,Ga)Se2 Solar Cells

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4849
Author(s):  
Chan Hyeon Park ◽  
Jun Yong Kim ◽  
Shi-Joon Sung ◽  
Dae-Hwan Kim ◽  
Yun Seon Do
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Surface Passivation ◽  
Rear Surface ◽  
Maximum Efficiency ◽  
Structural Factors ◽  
Carrier Recombination ◽  
Cigs Solar Cells ◽  
Effective Carrier ◽  
Opening Width

In this paper, we propose an optimized structure of thin Cu(In,Ga)Se2 (CIGS) solar cells with a grating aluminum oxide (Al2O3) passivation layer (GAPL) providing nano-sized contact openings in order to improve power conversion efficiency using optoelectrical simulations. Al2O3 is used as a rear surface passivation material to reduce carrier recombination and improve reflectivity at a rear surface for high efficiency in thin CIGS solar cells. To realize high efficiency for thin CIGS solar cells, the optimized structure was designed by manipulating two structural factors: the contact opening width (COW) and the pitch of the GAPL. Compared with an unpassivated thin CIGS solar cell, the efficiency was improved up to 20.38% when the pitch of the GAPL was 7.5–12.5 μm. Furthermore, the efficiency was improved as the COW of the GAPL was decreased. The maximum efficiency value occurred when the COW was 100 nm because of the effective carrier recombination inhibition and high reflectivity of the Al2O3 insulator passivation with local contacts. These results indicate that the designed structure has optimized structural points for high-efficiency thin CIGS solar cells. Therefore, the photovoltaic (PV) generator and sensor designers can achieve the higher performance of photosensitive thin CIGS solar cells by considering these results.

Enhancement of photovoltaic properties of CH3NH3PbBr3 heterojunction solar cells by modifying mesoporous TiO2 surfaces with carboxyl groups

2015 ◽  
Vol 3 (17) ◽  
pp. 9264-9270 ◽  
Author(s):  
Hyun Bin Kim ◽  
Iseul Im ◽  
Yeomin Yoon ◽  
Sang Do Sung ◽  
Eunji Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Mesoporous Tio2 ◽  
Heterojunction Solar Cell ◽  
Carboxyl Groups ◽  
Photovoltaic Properties ◽  
Heterojunction Solar Cells ◽  
Light Absorber

In a novel heterojunction solar cell employing CH3NH3PbBr3 (MAPbBr3) as the light absorber, the introduction of a carboxylate monolayer on the mesoporous TiO2 surfaces significantly enhances JSC as well as VOC.

scholarly journals Magnetron Sputtered Electron Blocking Layer as an Efficient Method to Improve Dye-Sensitized Solar Cell Performance

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2690
Author(s):  
Dariusz Augustowski ◽  
Paweł Kwaśnicki ◽  
Justyna Dziedzic ◽  
Jakub Rysz
Keyword(s):  
Solar Cell ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Dye Sensitized Solar Cell ◽  
Blocking Layer ◽  
Electron Blocking Layer ◽  
Solar Cell Performance ◽  
Force Microscopy ◽  
Dye Sensitized

The main efficiency loss is caused by an intensive recombination process at the interface of fluorine-doped tin oxide (FTO) and electrolyte in dye-sensitized solar cells. Electrons from the photoanode can be injected back to the redox electrolyte and, thus, can reduce the short circuit current. To avoid this, the effect of the electron blocking layer (EBL) was studied. An additional thin film of magnetron sputtered TiO2 was deposited directly onto the FTO glass. The obtained EBL was characterized by atomic force microscopy, scanning electron microscopy, optical profilometry, energy dispersive spectroscopy, Raman spectroscopy and UV-VIS-NIR spectrophotometry. The results of the current–voltage characteristics showed that both the short circuit current (Isc) and fill factor (FF) increased. Compared to traditional dye-sensitized solar cell (DSSC) architecture, the power conversion efficiency (η) increased from 4.67% to 6.07% for samples with a 7 × 7 mm2 active area and from 2.62% to 3.06% for those with an area of 7 × 80 mm2.

Self-assembled propylammonium cations at grain boundaries and the film surface to improve the efficiency and stability of perovskite solar cells

2019 ◽  
Vol 7 (41) ◽  
pp. 23739-23746 ◽  
Author(s):  
Chengbin Fei ◽  
Meng Zhou ◽  
Jonathan Ogle ◽  
Detlef-M. Smilgies ◽  
Luisa Whittaker-Brooks ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Perovskite Solar Cells ◽  
Film Surface ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Large Size ◽  
Moisture Stability

Large size cation (PA) was introduced into the grain boundary and film surface of the 3D perovskite to improve the solar cell efficiency and moisture stability.

Sign in / Sign up

Export Citation Format

Share Document