A microanalytical study of aluminium diffusion in photovoltaic cells using imaging-mode laser-induced breakdown spectrometry

Romero, D.; Laserna, J.J.

doi:10.1016/s0584-8547(00)00204-4

Cited by 30 publications

(12 citation statements)

References 22 publications

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“…18 The lack of control of pulse to pulse stability of these laser sources led to the development of gas lasers and, in 1980s, solid state lasers. 5 Nowadays, although several LIBS applications employing gas lasers can be cited, [64][65][66][67][68] and, in spite of the advantages of using ultra-short pulse lasers (discussed later), the more used laser source in LIBS is the Nd:YAG solid state laser, especially the actively Q-switched one. In addition, the use of diode pumped Nd:YAG laser sources instead flashlamp pumped ones is increasing, even with the higher costs of the diode pumped ones, due to their reduced dimensions, better pulse-to-pulse reproducibilities and lower beam propagation ratios (down to 1.3).…”

Section: +mentioning

confidence: 99%

“…For instance, CO 2 lasers emit in the mid-infrared (MIR) spectral region, 64 excimer and N 2 lasers emit in the ultraviolet (UV) region, [65][66][67][68] and Nd:YAG lasers emit in the near-infrared (NIR) region. One paper illustrates the energy transitions in the Nd:YAG active medium showing the main transition that gives origin to the radiation at 1064 nm.…”

Section: +mentioning

confidence: 99%

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Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

341

195

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Esta revisão descreve os aspectos fundamentais, a instrumentação, as aplicações e tendências futuras de uma técnica analítica que se encontra em seu estágio de consolidação e que está em vias de estabelecer o seu nicho entre as técnicas espectrofotométricas modernas. A técnica é denominada Espectroscopia de Emissão em Plasma Induzido por Laser (em inglês, Laser Induced Breakdown Spectroscopy, LIBS) e sua principal característica está no uso de pulsos de laser como fonte de energia para vaporizar a amostra e excitar a emissão de radiação eletromagnética, a partir de seus elementos e/ou fragmentos moleculares. A radiação emitida é analisada por meio de instrumentos ópticos de alta resolução e as suas intensidades são medidas, usualmente com detectores rápidos de estado sólido. Em conjunto, esses dispositivos permitem a geração e a medida de um espectro de emissão de faixa ampla do fenômeno induzido pelo pulso de laser. O espectro registrado contém informação qualitativa e quantitativa que pode ser correlacionada com a identidade da amostra ou empregada na determinação da quantidade de seus constituintes. Essa revisão é dividida em quatro partes. A primeira aborda aspectos históricos da técnica e os conceitos teóricos relevantes associados com LIBS; então, os aspectos práticos de diversas abordagens experimentais e instrumentais empregadas na implementação da técnica são revistos de forma crítica; as aplicações encontradas na literatura, incluindo aquelas que empregam quimiometria, são classificadas e exemplificadas por meio de trabalhos relevantes recentemente publicados. Finalmente, uma tentativa de estabelecer uma avaliação global e as perspectivas futuras para a técnica é apresentada.This review describes the fundamentals, instrumentation, applications and future trends of an analytical technique that is in its early stages of consolidation and is establishing its definitive niches among modern spectrometric techniques. The technique has been named Laser Induced Breakdown Spectroscopy (LIBS) and its main characteristic stands in the use of short laser pulses as the energy source to vaporize samples and excite the emission of electromagnetic radiation from its elements and/or molecular fragments. The emitted radiation is analyzed by high resolution optics and the intensities are recorded, usually by fast triggered solid state detectors. Together, these devices allow producing and registering a wide ranging emission spectrum of the short-lived phenomenon induced by the laser pulse. The spectrum contains qualitative and quantitative information which can be correlated with sample identity or can be used to determine the amount of its constituents. This review is divided in four parts. First, the relevant historical and theoretical concepts associated with LIBS are presented; then the main practical aspects of the several experimental and instrumental approaches employed for implementation of the technique are critically described; the applications related in the literature, including those making use of chemometri...

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Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

Laser Induced Breakdown Spectroscopy

Pasquini¹,

Cortez²,

Silva³

et al. 2007

J. Braz. Chem. Soc.

341

195

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8][9] This new regime, referred to as micro-LIBS or lLIBS, utilizes pulse energies below 100 lJ and allows the probing of smaller sample spots, which maximizes the spatial resolution for two-dimensional (2D) mapping of surfaces. [1][2][3][4][5][6]9 Fingerprints are a highly reliable method of identifying humans, as they have been found to be unique to each individual. 10 Objects that have been touched often have transferred fingerprints that can be used in criminal investigations or security applications.…”

Section: Introductionmentioning

confidence: 99%

Detection and Mapping of Latent Fingerprints by Laser-Induced Breakdown Spectroscopy

2006

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Detection of latent fingerprints on a Si wafer by laser-induced breakdown spectroscopy (LIBS) is demonstrated using approximately 120 fs pulses at 400 nm with energies of 84 +/- 7 microJ. The presence of a fingerprint ridge is found by observing the Na emission lines from the transferred skin oil. The presence of the thin layer of transferred oil was also found to be sufficient to suppress the LIBS signal from the Si substrate, giving an alternative method of mapping the latent fingerprint using the Si emission. A two-dimensional image of a latent fingerprint can be successfully collected using these techniques.

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“…The lateral resolution (that is, the minimum displacement between adjacent points on the sample surface) m ay be as low as 50 mm for the selected laser wavelength and under tight focusing conditions. 21 However, because of the need to keep the depth resolution to a reasonable level, the laser beam had to be focused 6 mm into the sample, which resulted in a practical lateral resolution of 1.7 mm for the present experiment. 20 This distance was chosen as no overlapping or redeposition of material from adjacent craters was obser ved.…”

Section: Resultsmentioning

confidence: 99%

Compositional Mapping of Poisoning Elements in Automobile Three-Way Catalytic Converters by Using Laser-Induced Breakdown Spectrometry

2001

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The use of laser-induced breakdown spectrometry (LIBS) for generating two-dimensional (2D) multielemental distribution maps of poisoning agents in automobile three-way catalysts (TWCs) is discussed. A complete in-depth analysis of P, Zn, and Pb at different locations along the central channel of a used TWC in the gas flow direction was performed. The distribution maps for the metals in charge of the catalytic action and for the stabilizer of these metals—i.e., Pt, Pd, and Ce—are also presented. The 2D maps provide a fast, useful, and intuitive tool to visualize the selective distribution of poisoning elements in a used TWC. This study may help explain the deterioration processes of a catalyst with a lifetime of about 30 000 km.

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A microanalytical study of aluminium diffusion in photovoltaic cells using imaging-mode laser-induced breakdown spectrometry

Cited by 30 publications

References 22 publications

Laser Induced Breakdown Spectroscopy

Laser Induced Breakdown Spectroscopy

Detection and Mapping of Latent Fingerprints by Laser-Induced Breakdown Spectroscopy

Compositional Mapping of Poisoning Elements in Automobile Three-Way Catalytic Converters by Using Laser-Induced Breakdown Spectrometry

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