Bartek J. Pawlak

An 8-Lane 58 Gb/s/lane 0.66 pJ/bit Modulator Driver Electrical-IC for a 3-D Integrated Silicon Photonic Transmitter in 22 nm FD-SOI Process

László Szilágyi, Bartek J. Pawlak, Luc Pauwels, Pieter Bex et autres

A modulator driver circuit for electro-absorbtion modulators (EAMs) is designed in 22 nm FD-SOI technology as part of the electrical integrated circuit (EIC) of a 3D-integrated 8 -lane silicon photonic (SiPh) transmitter. The high driving voltage EAMs require, exceeding the breakdown voltage …

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Avalanche effects in solid-phase epitaxial crystallization induced by light-ion irradiation

Nicholas E.B. Cowern, Bartek J. Pawlak, R. Gwilliam

Solid-phase epitaxial crystallization of amorphous Si layers on a crystalline Si substrate during B-ion irradiation is investigated over the temperature range 293 - 573 K. Regrowth occurs at all measured temperatures, with activation energy 0.07 eV and prefactor 2.36 nm / 10^14 …

Local traps as nanoscale reaction-diffusion probes: B clustering in c-Si

Bartek J. Pawlak, Nicholas E.B. Cowern, Chi Young Ahn, Wilfried Vandervorst et autres

A series of B implantation experiments into initially amorphized and not fully recrystallized Si, i.e., into an existing a/c-Si bi-layer material, have been conducted. We varied B dose, energy, and temperature during implantation process itself. Significant B migration has been observed within …

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Simple power-loss analysis method for high-efficiency Interdigitated Back Contact (IBC) silicon solar cells

Pierre Jacques Verlinden, Monica Alemán, Niels E. Posthuma, Jara Fernández et autres

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Development and Integration of a High Efficiency Baseline Leading to 23% IBC Cells

Monica Alemán, Joyonta Das, Tom Janssens, Bartek J. Pawlak et autres

This paper presents the development of single step processes and their integration into a baseline for the lab scale manufacturing of high efficiency IBC cells. The main processes evaluated include cleaning, oxidation, boron and phosphorous doping. Three different cleaning treatments, combined with …

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Impact of Surface Preparation Prior to ALD-Al2O3 for PERC Type Solar Cell

Aude Rothschild, János J. Tomán, Julien Penaud, P. Jaffrennou et autres

ALD processes are very surface sensitive and therefore surface preparation prior to ALD deposition of any passivation layer is a key parameter to control the interface properties of the c-Si/passivation layer. Previous studies on ALD-Al2O3 backside passivation, reported that hydrophilic (-OH) surfaces …

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Impact of surface preparation prior to ALD-Al2O3 deposition for PERC type solar cell

Aude Rothschild, János J. Tomán, Julien Penaud, P. Jaffrennou et autres

TMAH versus KOH based texturing chemistry for high efficiency interdigitated back-contact silicon solar cells

Bartek J. Pawlak, Pierre Jacques Verlinden, Kurt L. Wostyn, Monica Alemán et autres

Industrial integration of interdigitated back-contact Si solar cells by laser ablation

Bartek J. Pawlak, Bartlomiej Sojka, Jo Robbelein, Sukhvinder Singh et autres

Interdigitated back-contact solar cells for high efficiency applications are usually manufactured in R&D laboratories by multiple subsequent lithography steps. Here the patterning by litho-free steps is proposed and implemented. The current status of the small area (2×2cm2and 4×4cm2) n-type IBC solar cells …

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Studies of implanted boron emitters for solar cell applications

Bartek J. Pawlak, Tom Janssens, Sukhvinder Singh, I. Kuzma‐Filipek et autres

ABSTRACT B implanted emitters are investigated in the back junction cell configuration and their material properties are tested in double side implanted Si wafers. B has been implanted at 5 keV at various dose conditions varying from 1 × 1014 up to …

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Performance of a new type of module based on back-contact solar cells

Jonathan Govaerts, Jo Robbelein, Chun Gong, Bartek J. Pawlak et autres

Imec has developed a new technology to integrate and interconnect back-contact solar cells into modules, based on embedding cells in silicone on top of a glass substrate. This technology aims at an improved optical performance and reliability (through the use of silicones …

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Ion implantation as a potential alternative for the formation of Front Surface Fields for IBC silicon solar cells

Monica Alemán, Eveline Rosseel, Koen Van Wichelen, Bartek J. Pawlak et autres

Interdigitated back contacted cells (IBC) constitute an excellent option for the achievement of high-efficiency on silicon material. The effective implementation of an electrical field on the front side, also called Front Surface Field (FSF) is beneficial for this cell concept. It contributes …

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