Enhanced performance of GaInP/GaAs/Ge solar cells under high concentration through Pd/Ge/Ti/Pd/Al grid metallization

Huo, Pengyun; Lombardero, Iván; García, Iván

doi:10.1002/pip.3149

Cited by 16 publications

(14 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In practical PVLPCs, the J P can be lower, causing TJ failure and the well‐known dip in the I–V curve that degrades efficiency, as we will show later. The series resistance components (TJ series resistance, R sTJ , metal sheet resistance, R shM , and emitter/window sheet resistance, R shE ) correspond to our experimental values 9,19 . We use a thick window layer to reduce emitter/window sheet resistance.…”

Section: Nonuniformity and Pvlpc Modelmentioning

confidence: 74%

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

Delgado

García

Hinojosa

et al. 2023

Progress in Photovoltaics

Self Cite

View full text Add to dashboard Cite

Nonuniform irradiance profiles of lasers used in power‐by‐light systems deteriorate the efficiency of photovoltaic laser power converters. We analyze three approaches to deal with this efficiency loss: (1) to design the power converter front grid for the nonuniform light received from the power‐by‐light system; (2) to strengthen the peak current and decrease the series resistance of tunnel junctions; and (3) to homogenize the light spot impinging the power converter by simply distancing it from the laser fiber. In the context of these approaches, this paper tackles the optimization of multijunction photovoltaic laser power converters to achieve their maximum efficiency under nonuniform irradiance profiles, without using any optical element to homogenize them and, this way, reproducing realistic operating conditions. As a direct application of the design shown in this paper, we have increased the experimental efficiency of our GaAs devices by up to 3% absolute for a nominal laser wavelength of 857 nm.

show abstract

Section: Nonuniformity and Pvlpc Modelmentioning

confidence: 74%

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

Delgado

García

Hinojosa

et al. 2023

Progress in Photovoltaics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Besides, equation (6) shows that the STH efficiency of the PV-EWS system can be significantly enhanced by improving the PCE of a IIIV double junction device while maintaining a nearly constant voltage. This can be fulfilled by a current state-of-the-art concentrator photovoltaics (CPV) technology, which illuminates a small area of the PV device with very highly concentrated suns; this is one of the most promising solar technologies that is low-cost and highly efficient [41]. The Fraunhofer Institute for Solar Energy Systems has developed the FLATCON ® concentrator system [42], which is expected to be cost-competitive to the silicon PV technology in certain applications [43].…”

Section: Resultsmentioning

confidence: 99%

Photovoltaic Partner Selection for High-Efficiency Photovoltaic-Electrolytic Water Splitting Systems: Brief Review and Perspective

Pham

Lee

2021

Silicon

View full text Add to dashboard Cite

Photovoltaic-electrolysis water splitting (PV-EWS) is the most promising approach for high solarto-hydrogen (STH) efficiency. The present PV-EWS systems achieve the highest STH performance by using a IIIV triple-junction configuration, which, however, involves a complex and expensive manufacture process. Therefore, in this work, we demonstrate a IIIV double junction device that can be used as an alternative to the IIIV triple-junction device for high STH conversion efficiency of the PV-EWS systems. We estimate the STH performance via coupling world-recorded multi-junction photovoltaic (PV) and our experimented cell configurations with an EWS system. The results show that the IIIV double junction, owing to the good trade-off between the efficiency loss and compensation, exhibits a higher STH efficiency than the IIIV triple-junction. Furthermore, strategies for improving the efficiency of the IIIV double junction device for low-cost PV-EWS system are discussed.

show abstract

“…There is expectation that this technology will grow in the near future, as concentrators are now being used to boost the power output from crystalline silicon solar cells. [180][181][182][183] Series resistance is a key factor that constrains the electrical performance of solar cells under ultrahigh concentration, therefore, the formation of front metal grids with low metal-semiconductor contact resistance and low metal sheet resistance is crucial for high concentrator solar cells. Furthermore, the traditional metal contacts cover a substantial portion of the device area, resulting in reflected light that reduces the amount of current collected.…”

Section: Toward Commercializationmentioning

confidence: 99%

A Review on the Development of Metal Grids for the Upscaling of Perovskite Solar Cells and Modules

et al. 2021

View full text Add to dashboard Cite

Perovskites are materials with the same crystal structure of calcium titanate (CaTiO 3 ), which were discovered by Gustav Rose in 1839 and named after Russian mineralogist Lev Perovski (1792-1856). [1,2] Perovskites have a general formula of ABX 3 , where A and B are cations with different sizes (A > B) and X is an anion. [3] The crystalline structure of these materials depends on the temperature [4][5][6] and ionic or elemental radii of A, B, and X elements, [7] which could change from a cubic phase to a tetragonal phase or a low-symmetry orthorhombic phase.Perovskites may be separated in two classes: inorganic (such as PbTiO 3 , CaSiO 3 , etc) and hybrid organic-inorganic (CH 3 NH 3 PbI 3 , HCðNH 2 Þ 2 PbI 3 , etc.). Hybrid perovskites are the materials of choice in terms of research regarding photovoltaic applications. In these materials, A is an organic cation (such as methylammonium), and X is a monovalent halide anion (I À , Br À , or Cl À ). [8] The first hybrid perovskite studied was CH 3 NH 3 PbI 3 (MAPI), which was synthesized and described by Weber in 1978. [9] This material was shown to crystallize in three distinct structural phases: cubic above 330 K (space group Pm3m), a tetragonal phase from 160 to 330 K (space group I4/mcm), and an orthorhombic phase below 160 K (space group Pnma). [6,9] Lead halide perovskites have caught the attention of the scientific community in the last decade due to their singular properties, which include a direct bandgap (1.4-3.0 eV), [10][11][12][13] long charge diffusion length (>1 μm), [14] high absorption coefficient, [15] and high defect tolerance. [16] This last characteristic plays a very important role in the electronic properties of the material since it maintains good electronic quality despite the presence of defects. [17,18] So far, their main applications have been in solar cells, [19][20][21][22][23][24][25][26][27][28][29][30][31] light-emitting diodes, [32] lasers, [33] energy conversion and storage applications. [34,35] The first concrete application of hybrid perovskite films as active material in perovskite solar cells (PSCs) was accomplished in 2006 by Kojima et al., [36] who studied MAPbBr 3 PSCs and achieved a power conversion efficiency (PCE) of 2.2%. Some years later, in 2009, they substituted bromide for iodide, and the PCE was increased to 3.8%, even though the devices were unstable. [19] After these seminal works, the efficiency of the devices followed a continuous growth. Promising results came in 2012, when Kim et al. [37] replaced the liquid electrolyte with a hole conductor organic molecule known as spiro-OMeTAD. This change not only improved the stability of the cells but also increased their PCE to 9.7%. This approach was so successful that it remains relevant and in frequent use until now. In 2013, Burschka et al. [23] proposed a sequential (two steps) technique to deposit perovskite films in which firstly a PbI 2 layer is deposited, followed by deposition of methylammonium iodide

show abstract

Enhanced performance of GaInP/GaAs/Ge solar cells under high concentration through Pd/Ge/Ti/Pd/Al grid metallization

Cited by 16 publications

References 47 publications

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

Photovoltaic Partner Selection for High-Efficiency Photovoltaic-Electrolytic Water Splitting Systems: Brief Review and Perspective

A Review on the Development of Metal Grids for the Upscaling of Perovskite Solar Cells and Modules

Contact Info

Product

Resources

About