24% efficient perl silicon solar cell: Recent improvements in high efficiency silicon cell research

Zhao, Jianhua; Wang, Aihua; Altermatt, Pietro P.; Wenham, Stuart; Green, Martin A.

doi:10.1016/0927-0248(95)00117-4

Cited by 206 publications

(109 citation statements)

References 4 publications

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“…This makes it possible to determine the surface recombination velocity S back and the internal reflectivity R back quite accurately [2]. Figure 2 shows the measured internal quantum efficiencies of different rear structures starting from a low-quality ohmic Al contact up to a PERL [3]/LBSF [4] rear surface. The effective S back and R back have been extracted from the IQE and reflection measurement.…”

Section: Dielectric Passivation Versus Back Surface Fieldmentioning

confidence: 99%

“…For thickening of the seed layers (i.e., the growth step), at Fraunhofer ISE and other institutes [3], the light-induced electroplating process is used, which utilizes the photovoltaic effect of the cell and allows to contact only the fully metallized rear surface during plating (see Figure 10). Thus, the complexity of this selective process is reduced considerably.…”

Section: Light-induced Platingmentioning

confidence: 99%

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High-Efficiency Crystalline Silicon Solar Cells

Glunz

2007

Advances in OptoElectronics

118

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The current cost distribution of a crystalline silicon PV module is clearly dominated by material costs, especially by the costs of the silicon wafer. Therefore cell designs that allow the use of thinner wafers and the increase of energy conversion efficiency are of special interest to the PV industry. This article gives an overview of the most critical issues to achieve this aim and of the recent activities at Fraunhofer ISE and other institutes.

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Section: Dielectric Passivation Versus Back Surface Fieldmentioning

confidence: 99%

Section: Light-induced Platingmentioning

confidence: 99%

High-Efficiency Crystalline Silicon Solar Cells

Glunz

2007

Advances in OptoElectronics

118

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“…Contact area recombination and contact resistance can be minimized by a selective emitter approach that also improves the blue response. Point contact rear surface (local boron diffusion) with thermal oxide passivation, in the non-contacted rear surface covered with aluminium, further reduces recombination [7]. 'Smart Plus Module" A new PV module has been developed by Innotech Solar (ITS), which embeds three chips (ICs) in the laminate replacing both the bypass diode and junction box.…”

Section: Passivated Emitter Rear Locally Diffused Cell (Perl)mentioning

confidence: 99%

Photovoltaics in India-Thrust on Research and Education

Ramchander¹,

Das²,

Surendra³

2015

Journal of Engineering Education Transformations

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Abstract-Photovoltaics has registered an impressive growth despite the vicissitudes of the sixty years since the first solar cell was developed at the BELL LABS in 1954. It is a defining moment for the PV Industry today as costs are coming down with economies of scale and the need for clean and green energy is gathering momentum. This paper reviews some of the recent trends in photovoltaic technology, the research initiatives in India and also how the academia in our country is gearing up to meet the objectives enunciated in the Jawaharlal Nehru Solar Mission document in terms of training, curriculum development and research in collaboration with the Industry. The ultimate aim is to ensure energy sufficiency, energy security and reliability.

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“…At the rear surface of double-side contacted c-Si solar cells where the base contact is located, these requirements are often fulfilled by the combination of a dielectric passivating film with local contacts defined in a point-like pattern. This configuration was already applied in the high efficiency concepts developed in the 90's where the contacts were defined by photolithography [1][2]. In the last years, this idea has been revisited due to the introduction of laser techniques that allow the definition of the point-like pattern in a very cost-effective way.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of base resistance contribution for point-like contacted c-Si solar cells using impedance spectroscopy analysis

Orpella

Martı́n

López-González

et al. 2015

Solar Energy Materials and Solar Cells

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Abstract:One of the most common strategies in high-efficiency crystalline silicon (c-Si) solar cells for the rear surface is the combination of a dielectric passivation with a point-like contact to the base. In such devices, the trade-off between surface passivation and ohmic losses determines the optimum distance between contacts or pitch. Given a certain pitch, the series resistance related to majority carrier flow through the base and the rear point-like contact (R base ) is commonly calculated a-priori and not crosschecked in finished devices, since typical techniques to measure series resistance lead to an unique value that includes all ohmic losses. In this work, we present a novel method to measure R base using impedance spectroscopy (IS) analysis. The IS data at high frequencies allow to determine R base due to the presence of the capacitor formed by the metal/dielectric/semiconductor structure that covers most of the rear surface. The method is validated by device simulations where the dependence of R base on carrier injection, base resistivity and pitch are reproduced. Finally, R base is measured on finished devices. As a result, a more accurate value of the contacted area is deduced which is a valuable information for further device optimization.

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24% efficient perl silicon solar cell: Recent improvements in high efficiency silicon cell research

Cited by 206 publications

References 4 publications

High-Efficiency Crystalline Silicon Solar Cells

High-Efficiency Crystalline Silicon Solar Cells

Photovoltaics in India-Thrust on Research and Education

Experimental determination of base resistance contribution for point-like contacted c-Si solar cells using impedance spectroscopy analysis

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