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Lluis F. Marsal
Rovira i Virgili University
Analytical chemistryPhysicsMaterials scienceNanoporousPhotonic crystal
277Publications
32H-index
3,649Citations
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Publications 294
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Abstract A study on advanced structural engineering of anodic alumina nanotubes (AANTs) manufactured by pulse anodization is presented. In-depth analysis of the pulse anodization was carried out, distinctive sections of the anodization were defined. Evolution of the profiles has been quantified and described with regards to different current density applied and pulse duration during hard anodization. A smart combination of different anodization conditions enables precise control over the nanotub...
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Organic photovoltaic (OPV) has a prospective future as a reliable energy harvesting to drive low power consumption devices for indoor applications. In this article, the outdoor (1 sun) and indoor (LED 2700K) performance of PTB7-Th:PC70BM inverted OPV with three different solution-processed electron transport layers (ETL = PFN, TiOx, and ZnO) were compared. The morphology, optical, and electrical measurements indicate the strong dependency of the OPV performance with the illumination conditions. ...
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#1Laura PolH-Index: 2
Last. Lluis F. MarsalH-Index: 32
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Last. Lluis F. MarsalH-Index: 32
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The detection of Raman signals from diluted molecules or biomaterials in complex media is still a challenge. Besides the widely studied Raman enhancement by nanoparticle plasmons, interference mechanisms provide an interesting option. A novel approach for amplification platforms based on supported thin alumina membranes was designed and fabricated to optimize the interference processes. The dielectric layer is the extremely thin alumina membrane itself and, its metallic aluminum support, the ref...
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#2José G. SánchezH-Index: 4
Last. Lluis F. MarsalH-Index: 32
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In this work, the degradation study of PTB7-Th:PC7oBM-based inverted organic solar cells (iOSCs) by impedance spectroscopy is presented. Titanium oxide (TiO x ) with an ultra-thin film thickness was used as electron transport layer (ETL). A high performance of the TiOx-based device is achieved with the power conversion efficiency (PCE) of up to 9.83% for the fresh device. To gain a better understanding to the effect of TiO x as ETL on device performance and stability, a degradation measurement w...
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#1A. SacramentoH-Index: 1
Last. Lluis F. MarsalH-Index: 32
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In this work, we analyze the stability and degradation over time of inverted organic solar cells (iOSCs) using a stack layer of vanadium oxide and nickel oxide as hole transport layers (HTL). The parameter used to compare with other cells is the power conversion efficiency (PCE). Vanadium oxide layer (V 2 O 5 ) used as HTL is the reference in this work which is monitored the stability and degradation. All devices are fabricated under nitrogen environment. The stack layer thickness used as HTL is...
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#2A. SacramentoH-Index: 1
Last. Magali EstradaH-Index: 4
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The effects of hafnium oxide (HfO2) as hole blocking layer (HBL) on the stability and degradation under air environment of inverted bulk heterojunction organic solar cells (iOSC), using as donor material thieno[3,4b]thiophene-alt-benzodithiophene (PTB7) and as acceptor material [6], [6]-phenyl C71 butyric acid methyl ester (PC 70 BM) are presented. The ultrathin films of HfO 2 layers 0.9 nm of thick were deposited by thermal evaporation. The highest power conversion efficiency obtained (PCE) was...
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#2José G. SánchezH-Index: 4
Last. Josep PallarèsH-Index: 29
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In this research work, efficient inverted polymer solar cells (iPSCs) were fabricated for the first time using simple and low cost spray pyrolysis (SP) technique to deposit ZnO thin film as electron transporting layer (ETL) with the structure of ITO/ZnO/PTB7-Th: PC 70 BM/V 2 O 5 /Ag. The effect of the different number of running cycles with the SP technique on the iPSC performance has been investigated. In addition, a state of the art for iPSCs fabricated by spin coating technique has been used ...
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This study presents a Gaussian pulse anodization approach to generate nanoporous photonic crystals with highly tunable and controllable optical properties across the visible-NIR spectrum. Nanoporous anodic alumina Gaussian photonic crystals (NAA-GPCs) are fabricated in oxalic acid electrolyte by Gaussian pulse anodization -a novel form of pulse-like anodization. The effect of the Gaussian pulse width in the anodization profile on the optical properties of these photonic crystals is assessed by s...
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