Large area full fill factor microlens arrays

1996 ◽  
Author(s):  
M. McCormick
Keyword(s):  
Fill Factor ◽  
Large Area ◽  
Microlens Arrays

Highly uniform manufacturing method for large-area microlens arrays

2017 ◽  
Vol 95 (1-4) ◽  
pp. 99-108 ◽  
Author(s):  
Xiaodong Zhang ◽  
Lihua Li ◽  
Zexiao Li ◽  
Changyuen Chan ◽  
Linlin Zhu ◽  
...  
Keyword(s):  
Large Area ◽  
Microlens Arrays ◽  
Manufacturing Method ◽  
Highly Uniform

Side-chain effect on the photovoltaic performance of conjugated polymers based on benzodifuran and benzodithiophene-4,8-dione

MRS Advances ◽  
2019 ◽  
Vol 4 (36) ◽  
pp. 2001-2007
Author(s):  
Enfang He ◽  
Hong Zhang ◽  
Yueyue Gao ◽  
Fengyun Guo ◽  
Shiyong Gao ◽  
...  
Keyword(s):  
Fill Factor ◽  
Open Circuit Voltage ◽  
Polymer Solar Cells ◽  
Photovoltaic Performance ◽  
Open Circuit ◽  
Side Chain ◽  
Large Area ◽  
Device Structure ◽  
Roll To Roll ◽  
Solvent Additive

ABSTRACT:Two benzodifuran (BDF) polymers, PBDF-C and PBDF-S, with alkyl and alkylthio substituted thiophene side-chains and benzodithiophene-4,8-dione (BDD) as the acceptor were designed and synthesized. Their optical, electrochemical properties and photovoltaic performances were systematically investigated. The polymer solar cells (PSCs) with a device structure of ITO/PEDOT:PSS/polymer:PC71BM/Ca/Al were fabricated. The PBDF-C based device showed a power conversion efficiency (PCE) of 3.01% after adding 1 vol% 1,8-diodooctane (DIO) as the solvent additive, and PBDF-S gave an enhanced PCE of 3.48% without any post-treatments. The enhancements were from the higher open-circuit voltage (Voc) and fill factor (FF). The thermal- and solvent-treatment-free processing is more favourable for the large area roll-to-roll manufacturing or printing technology for PSCs.

Spherical and non-spherical high fill-factor microlens arrays fabricated by polymer coating on isotropically etched quartz

2011 ◽  
Author(s):  
Minwoo Nam ◽  
Haekwan Oh ◽  
Geunyoung Kim ◽  
Hyunwoo Seo ◽  
Yotak Song ◽  
...  
Keyword(s):  
Polymer Coating ◽  
Fill Factor ◽  
Microlens Arrays ◽  
High Fill Factor

Microlens Array Fabrication by 3D Diffuser Lithography for Light Enhancement of Organic Light-Emitting Devices

2014 ◽  
Vol 625 ◽  
pp. 430-436
Author(s):  
Hung Yi Lin ◽  
Yong Shan Sun ◽  
Shih Liang Chen ◽  
Mao Kuo Wei
Keyword(s):  
Fill Factor ◽  
Microlens Array ◽  
Microlens Arrays ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Circular Holes ◽  
Organic Light Emitting Devices ◽  
Pdms Molding ◽  
Array Fabrication

Microlens arrays have been fabricated by 3D diffuser lithography in this study. The method mainly adopts two kinds of diffuser films with different transmittances and hazes, integrated by photolithography, polydimethylsiloxane (PDMS) molding and UV forming techniques, to get microlens arrays with different parameters and geometries. The features, such as height, geometry and fill factor of microlens arrays, are controlled by photolithography, using a photomask with circular holes and different exposure doses. The microlens arrays can also be duplicated and transferred to the surface of flexible polyethylene terephthalate (PET) substrate through PDMS molding and UV forming processes. Finally, the outcoupling efficiency of microlens arrays attached to organic light-emitting devices (OLEDs) can be measured and analyzed. More than 60% enhancement of luminous current efficiency can be obtained in experimental results.

scholarly journals Fill-factor improvement of Si CMOS single-photon avalanche diode detector arrays by integration of diffractive microlens arrays

2015 ◽  
Vol 23 (26) ◽  
pp. 33777 ◽  
Author(s):  
Giuseppe Intermite ◽  
Aongus McCarthy ◽  
Ryan E. Warburton ◽  
Ximing Ren ◽  
Federica Villa ◽  
...  
Keyword(s):  
Fill Factor ◽  
Single Photon ◽  
Microlens Arrays ◽  
Detector Arrays ◽  
Avalanche Diode ◽  
Diode Detector ◽  
Diffractive Microlens

LARGE AREA PARALLEL SURFACE NANOSTRUCTURING WITH LASER IRRADIATION THROUGH MICROLENS ARRAYS

2010 ◽  
Vol 17 (03) ◽  
pp. 383-387
Author(s):  
C. S. LIM ◽  
M. H. HONG ◽  
Y. LIN ◽  
L. S. TAN ◽  
A. SENTHIL KUMAR ◽  
...  
Keyword(s):  
Substrate Surface ◽  
Microlens Array ◽  
Laser Pulses ◽  
Polymer Materials ◽  
Direct Writing ◽  
Large Area ◽  
Microlens Arrays ◽  
Force Microscopy ◽  
Surface Nanostructuring ◽  
Parallel Surface

In the past decade, the development of nanoelectronics and nano-optics has attracted much interest in surface nanostructuring of semiconductor materials. The irradiation of a microlens array by a laser beam generates many focused light spots, which can act as a direct writing tool on photo-polymer materials. This maskless surface nanostructuring technique enables thousands to millions of identical nano-features to be patterned in a couple of laser pulses. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) images show that nano-features were patterned uniformly on the substrate surface, which suggests a versatile way of parallel surface nanostructuring over a large area. The simulation results of the energy flux distribution at the focal plane of the microlens arrays will also be discussed.

scholarly journals Effects of Hole-Collecting Buffer Layers and Electrodes on the Performance of Flexible Plastic Organic Photovoltaics

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Sungho Woo ◽  
Hong-Kun Lyu ◽  
Yoon Soo Han ◽  
Youngkyoo Kim
Keyword(s):  
Indium Tin Oxide ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Series Resistance ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Buffer Layers ◽  
Large Area

Here we report the influences of the sheet resistance (Rsheet) of a hole-collecting electrode (indium tin oxide, ITO) and the conductivity of a hole-collecting buffer layer (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), PEDOT:PSS) on the device performance of flexible plastic organic photovoltaic (OPV) devices. The series resistance (RS) of OPV devices steeply increases with increasingRsheetof the ITO electrode, which leads to a significant decrease of short-circuit current density (JSC) and fill factor (FF) and power conversion efficiency, while the open-circuit voltage (VOC) was almost constant. By applying high-conductivity PEDOT:PSS, the efficiency of OPV devices with highRsheetvalues of 160 Ω/□ and 510 Ω/□ is greatly improved, by a factor of 3.5 and 6.5, respectively. These results indicate that the conductivities of ITO and PEDOT:PSS will become more important to consider for manufacturing large-area flexible plastic OPV modules.

High Resolution, High Fill Factor A-SI:H Sensor Arrays for Optical Imaging

1999 ◽  
Vol 557 ◽  
Author(s):  
J.T. Rahn ◽  
F. Lemmi ◽  
P. Mei ◽  
J.P. Lu ◽  
J.B. Boyce ◽  
...  
Keyword(s):  
Fill Factor ◽  
Sensor Arrays ◽  
Dimensional Structure ◽  
Pixel Size ◽  
Large Area ◽  
Leakage Currents ◽  
Active Matrix ◽  
3 Dimensional ◽  
Layer Contact ◽  
High Fill Factor

AbstractAmorphous silicon large area sensor arrays are in production for x-ray medical imaging. The most common pixel design works very well for many applications but is limited in spatial resolution because the available sensor area (the fill factor) vanishes in small pixels. One solution is a 3-dimensional structure in which the sensor is placed above the active matrix addressing. However, such high fill factor designs have previously introduce cross talk between pixels.We present data for a design in which the a-Si:H p-i-n photodiode sensor layer has a continuous i-layer and top p+-layer, and a patterned n+-layer contact to the pixel. Arrays of 64 μm and 75μm pitch have been fabricated and are the highest resolution a-Si:H arrays reported to date. The resolution matches the pixel size, and sensitivity has been improved by the high fill factor. Comparison is made between arrays with standard TFTs and TFTs with self-aligned source and drain contacts. Data line capacitance is improved by use of the self-aligned contacts.Measurements are included on the contact to bias capacitance. The high fill factor design greatly suppresses lateral leakage currents, while retaining ease of processing. Provided illumination levels remain below saturation, the resolution matches expectation for the pixel size.

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