Monolithical Serial Interconnects of Large CIS Solar Cells with Picosecond Laser Pulses

Heise, G.; Domke, Matthias; Konrad, Jan; Pavic, Florian; Schmidt, Matthias; Vogt, Helmut; Heiß, A.; Palm, J.; Huber, Heinz P.

doi:10.1016/j.phpro.2011.03.117

Cited by 24 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ability of solution processing opens the way for variable production schemes utilizing high throughput roll-to-roll (R2R) or inkjet sheet-to-sheet production of OPV cells [3]. The advantages of the various solution processing methods were already discussed for poly(3-hexylthiophene) (P3HT)/ [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) composites [4]. Besides inkjet printing, slot die and roller coating techniques were the most frequently demonstrated production methods.…”

Section: Introductionmentioning

confidence: 99%

“…Thin-film laser processing with picosecond and femtosecond pulsed laser sources developed rapidly during the last years, mainly driven by applications in thin-film PV cells and display technology [5][6][7][8][9][10][11]. On the one hand, the laser systems became more and more reliable, operating for thousands of hours without the necessity of service.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Patterning of organic photovoltaic modules by ultrafast laser

Kubiš

Stubhan

et al. 2013

Progress in Photovoltaics

View full text Add to dashboard Cite

In this paper, we demonstrate that laser patterning of organic solar cells by ultrafast laser systems (pulse length <350 fs) is an attractive process to produce photovoltaic modules with outstanding high geometric fill factors. Moreover, in terms of precision, registration, and debris generation and in terms of keeping the damage to the underneath layers at a minimum, ultrafast laser patterning with a pulse length of few hundreds of femtoseconds turns out to yield superior results. Ablation of all three different solar cell layers (electrodes (P1 and P3) and interfaces and semiconductor (P2)) is achieved with a single wavelength simply by a precise adjustment of the laser fluence and the patterning overlap. Camera positioning allows a precise registration between the various processing steps and a reduction of the width of the overall interconnection regime to the hundreds of micrometers dimension, resulting in high geometrical fill factors of over 90% for monolithically interconnected organic solar cell modules.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Patterning of organic photovoltaic modules by ultrafast laser

Kubiš

Stubhan

et al. 2013

Progress in Photovoltaics

View full text Add to dashboard Cite

show abstract

“…Laser scribing is commonly used in the solar industry for production of CIGS thin film solar modules 5,6 . Several groups have reported on the effect of the laser processing parameters on the laser scribing process, such as the pulse length 3 and fluency requirements 7 .…”

Section: Introductionmentioning

confidence: 99%

The effect of film properties and laser processing parameters on the laser ablation of molybdenum thin films

et al. 2014

View full text Add to dashboard Cite

Molybdenum is commonly used as the electrical back contact for Cu(In,Ga)(Se,S) 2 thin-film solar cells. In order to create a monolithically interconnected device, scribing of the molybdenum layer is required. This scribe, known as the P1 scribe, is commonly carried out through laser processing. Optimization of this laser scribing has been carried out using a 532nm pulsed Nd:YAG laser. It was found that two specific regimes of processing resulted in defect free scribes. These regimes are low fluency and high pulse overlap, and high fluency and low pulse overlap. Film properties, including the microstructure, surface oxidation, and internal stress, were studied to understand their effect on the laser ablation process. It was observed that a thin layer of oxidation resulted in significant heat affected zone during the laser ablation process. A discussion of the optimal film properties and laser processing parameters is presented.

show abstract

“…The objective of this paper is to discuss several process modifications and to demonstrate which process requires less laser energy and has the potential to be scaled in speed. Current processing speeds achieved with high repetition rate lasers have been published in .…”

Section: Introductionmentioning

confidence: 99%

Optimization of picosecond laser structuring for the monolithic serial interconnection of CIS solar cells

Heise

Heiß²,

Hellwig

et al. 2012

Progress in Photovoltaics

Self Cite

View full text Add to dashboard Cite

We report on the optimization of selective picosecond laser structuring for the monolithic serial interconnection of (Cu(In,Ga)(S,Se)2) CIS thin film solar cells. We introduce a quantitative value to compare the energy efficiency of the different investigated laser processes, the specific ablation energy, which indicates the required energy to remove a certain volume of the specific material. We have examined the structuring efficiencies for induced laser ablation processes for a modification of the beam profile (elliptical and flat‐top beam shaping) and for the application of different laser wavelengths (1064 and 532 nm). Application of induced laser processes (often referred as “lift‐off”) decreases the specific ablation energy dramatically by nearly one order of magnitude. Modifications of the beam profile such as elliptical and flat‐top beam shaping are nearly halving the energy per ablated volume relative to a circular beam. The application of a laser wavelength 532 nm decreases the specific ablation energy compared with 1064 nm significantly for processes involving the CIS layer. We finally demonstrate that with a picosecond laser power of only 2 W, the molybdenum back contact (P1, glass side) and the ZnO front contact (P3, ZnO on CIS) can be structured with a process speed of up to 4 m/s. About 2 µm thick CIS layer (P2) is structured by standard direct laser ablation at higher energy densities with 200 mm/s. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

Monolithical Serial Interconnects of Large CIS Solar Cells with Picosecond Laser Pulses

Cited by 24 publications

References 12 publications

Patterning of organic photovoltaic modules by ultrafast laser

Patterning of organic photovoltaic modules by ultrafast laser

The effect of film properties and laser processing parameters on the laser ablation of molybdenum thin films

Optimization of picosecond laser structuring for the monolithic serial interconnection of CIS solar cells

Contact Info

Product

Resources

About