Time filter

Source Type

Catana, Italy

Mello D.,STMicroelectronics | Ricciari R.,STMicroelectronics | Battaglia A.,3Sun | Foti M.,STMicroelectronics | Gerardi C.,STMicroelectronics
Microelectronics Reliability | Year: 2015

Thin-film silicon modules are commonly produced by an alternating sequence of layer deposition and layer patterning steps, which lead to a monolithic series connected device. Most used process is laser scribing process that offers a high throughput and a small area loss. Tin oxide (SnO2) or zinc oxide (ZnO) are the most used front contact TCO in the superstrate configuration. ZnO presents better optical properties with respect to SnO2 and can be realized by low thermal and cost effective deposition processes. Electrical performance of our tandem thin film silicon cell deposited on ZnO front contact has shown higher shunt with respect with our reference process using SnO2 front contact, not explained only as difference between the two materials. In this work, a failure analysis process was followed in order to explain the origin of the difference. SEM, FIB and Auger electron spectroscopy were used in order to characterize the laser scribe that is known to be a possible cause of electrical deviation. We found residuals either on the bottom either on the later wall of P3 scribe that can explain the lowering shunt resistance and open circuit voltage observed into the electrical performances of the module. © 2015 Elsevier Ltd. Source

Foti M.,STMicroelectronics | Tringali C.,STMicroelectronics | Battaglia A.,3Sun | Sparta N.,STMicroelectronics | And 3 more authors.
Solar Energy Materials and Solar Cells | Year: 2014

We report on flexible photovoltaic cell fabricated on polymeric substrate optimized for indoor energy harvesting. We have fabricated small area modules (up to 30 cm2) obtained by monolithic integration of a-Si:H p-i-n solar cells deposited by PECVD at low temperature with excellent mechanical strength, high ability of folding and very good stability. The photovoltaic thin film module is optimized for indoor light generated by indoor lamps and has efficiency as high as 9.1% on aperture area even at less than 100 lx of light intensity (under F12 fluorescent lamp spectrum). The optimized system can be used to energize thin film batteries and can be assembled in a flexible system associated with a wireless sensor network or other electronic devices. © 2014 Elsevier B.V. Source

Ferlito E.P.,STMicroelectronics | Ricciari R.,STMicroelectronics | Padalino M.,STMicroelectronics | Grasso S.,Olivetti | And 5 more authors.
Surface and Interface Analysis | Year: 2014

Among the transparent conductor, one of themost interesting is the Al doped MgxZn1-xO films for their electrical properties that make it very attracting for solar cell application. In thiswork, the Mg distribution in Al doped MgxZn1-xO films was investigated in order to find a reliable methods to determine Mg distribution. In particular, X-ray diffraction, Auger electron spectroscopy and time of flight secondary ion mass spectrometry were used to characterize the film. Time of flight secondary ion mass spectrometry MCs+ results appear to be the most promising analytical technique. Copyright © 2014 John Wiley & Sons, Ltd. Source

Discover hidden collaborations