Adhesion quality of evaporated aluminum layers on passivation layers for rear metallization of silicon solar cells

Kumm, Julia; Hartmann, Philip; Eberlein, D.; Aßmus, W.

doi:10.1016/j.tsf.2016.05.031

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…Finally, 20 nm of Au was deposited on top of 2 nm of molybdenum (Mo). These metals were chosen due to their varying adhesion strengths from weak to strong, depending on the deposition technique and parameters 21–23 . Metals such as chromium and titanium, in combination with Au, showed no peeling and therefore were eliminated from further experimentations.…”

Section: Resultsmentioning

confidence: 99%

“…These metals were chosen due to their varying adhesion strengths from weak to strong, depending on the deposition technique and parameters. [21][22][23] Metals such as chromium and titanium, in combination with Au, showed no peeling and therefore were eliminated from further experimentations. Al/Au, Ni/Au, and Mo/Au showed peeling but still had good adhesion to the silicon during the electroplating process (Figure 4A-C).…”

Section: Microstructures Adhesion To Siliconmentioning

confidence: 99%

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High‐resolution patterning on LTCC by transfer of photolithography‐based metallic microstructures

Supreeti,

Fischer,

Fritz

et al. 2023

Int J Applied Ceramic Tech

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The growing applications and constant miniaturization of electronic devices and of low‐temperature co‐fired ceramics (LTCC) in various fields, such as aviation, telecommunications, automotive, satellite communications, and military, have led to an increase in the demand for LTCC. Such prospects arise due to the continuous scaling down of components and high‐density interconnection in electronics packaging. This paper reports a technique for the transfer of high‐resolution microstructures from silicon substrates to LTCC. In this method, gold and copper patterns were formed by photolithography, electrodeposition, and residual layer stripping on silicon substrate. Lithography provides the opportunity to create and transfer complex patterns for use in several different applications and electroplating enables the use of pure metal for excellent electrical properties. The developed structures were transferred onto a top layer of LTCC tape using hot embossing. Then, the subsequent layers were stacked, laminated, and sintered. A resolution of 1.5 μm after free sintering and 4.5 μm after pressure‐assisted sintering was achieved. This distinctive method can be useful for several applications requiring high‐resolution and superior electrical properties.

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Section: Resultsmentioning

confidence: 99%

Section: Microstructures Adhesion To Siliconmentioning

confidence: 99%

High‐resolution patterning on LTCC by transfer of photolithography‐based metallic microstructures

Supreeti,

Fischer,

Fritz

et al. 2023

Int J Applied Ceramic Tech

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“…Specifically, for the rear contact, we used a low-work-function metal to tune the work function. Considering the direct evaporation of the low-work-function metal might cause poor adhesion, we used an ultrathin metallic adhesion layer (Ag) along with the low-work-function metal (Mg) to improve the rear contact quality in organic/Si hybrid solar cells, inspired by the adhesion layer in passivated emitter rear cells (PERC) and surface plasmon resonance sensors. , Consequently, we succeeded to reduce the series resistance ( R S ), tune the work function, and form the Ohmic contact simultaneously. Moreover, for the front passivation, a low-cost surfactant along with PEDOT:PSS instead of a single layer was used to improve the passivation effect of Si, leading to an increased minority carrier lifetime from 138.81 to 252.89 μs.…”

Section: Introductionmentioning

confidence: 99%

Dual Bilayer for Improving Contact Quality and Passivation Enables Efficient Organic/Planar-Si Hybrid Solar Cells with a Champion V_OC of over 656 mV

Qiu

Ren

et al. 2021

ACS Appl. Energy Mater.

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The contact quality between Si and the rear electrode and the passivation of Si play crucial roles in efficient organic/Si hybrid solar cells, especially for the open-circuit voltage (V OC ). Herein, we reported a dual bilayer structure to synergistically improve both rear contact quality and passivation of Si to enhance the performance of organic/planar-Si hybrid solar cells. Series resistance (R S ) extracted by the double diode model, contact quality explored by the Cox and Strack (CS) method, and the work function measured by ultraviolet photoelectron spectroscopy (UPS) revealed that the work function of the rear electrode effectively decreased after adding a metallic bilayer at the interface between Si and the rear electrode, which reduced the contact barrier, led to an Ohmic contact, and facilitated the transportation of electrons. Moreover, the minority carrier lifetime increased from 138.81 to 252.89 μs after applying a surfactant on top of the organic film because of the improved passivation effect. Remarkably, the best power conversion efficiency (PCE) of 14.40% for the dual bilayer planar solar cell is obtained, with a champion V OC of 656.4 mV. We provide an effective and facile strategy to design high efficiency with superior V OC by improving contact quality and passivation simultaneously in the Si-based solar cells.

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“…A larger magnification of the micrograph at the interface is also shown in the inset. The observed interfacial abruptness and voids are likely attributed to the formation of H 2 bubbles by the interaction of Al with adsorbed H 2 O on the surface [22]. The typical thickness of the film and native aluminum oxide measured is around 80 and 5 nm, respectively.…”

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confidence: 85%

Electrochemical deposition and surface studies of Mo-oxide based thin films for CO2 sorption applications

Tanhaei¹

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First and foremost, I would like to express my deepest gratitude to my supervisor, Dr. Sing Yang Chiam, for the continuous support of my research with his immense knowledge and expertise, for his enthusiasm, patience, and for granting me much freedom to carry out independent work. I learned what a true researcher should be from him. I would like to express my sincere gratitude to Dr. Jisheng Pan, my co-supervisor, who patiently guided me throughout important experiments and helped in the scientific discussions. My utmost respect and gratitude go to my NTU supervisor, professor Sum Tze-Chien, who supported me in every step and guided me with his wise advice throughout this journey. I would like to thank Dr. Yi Ren and Dr. Jayce JW Cheng for their assistance and instructions, which made my Ph.D. enjoyable. My sincerest thanks also go to Agency for Science, Technology and Research (A*STAR) for generously providing me with the Singapore International Graduate Award (SINGA) scholarship to pursue my Ph.D. studies.Last but most importantly, my heartfelt gratitude goes to my wife (Zahra) and my family, who are a great source of motivation and inspiration each and every day for me. For their unconditional love, support, and understanding throughout my life.

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Adhesion quality of evaporated aluminum layers on passivation layers for rear metallization of silicon solar cells

Cited by 6 publications

References 30 publications

High‐resolution patterning on LTCC by transfer of photolithography‐based metallic microstructures

High‐resolution patterning on LTCC by transfer of photolithography‐based metallic microstructures

Dual Bilayer for Improving Contact Quality and Passivation Enables Efficient Organic/Planar-Si Hybrid Solar Cells with a Champion V_OC of over 656 mV

Electrochemical deposition and surface studies of Mo-oxide based thin films for CO2 sorption applications

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Adhesion quality of evaporated aluminum layers on passivation layers for rear metallization of silicon solar cells

Cited by 6 publications

References 30 publications

High‐resolution patterning on LTCC by transfer of photolithography‐based metallic microstructures

High‐resolution patterning on LTCC by transfer of photolithography‐based metallic microstructures

Dual Bilayer for Improving Contact Quality and Passivation Enables Efficient Organic/Planar-Si Hybrid Solar Cells with a Champion VOC of over 656 mV

Electrochemical deposition and surface studies of Mo-oxide based thin films for CO2 sorption applications

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Dual Bilayer for Improving Contact Quality and Passivation Enables Efficient Organic/Planar-Si Hybrid Solar Cells with a Champion V_OC of over 656 mV