0000000001233571
AUTHOR
A Busacca
Photovoltaic characterization of organic solar cells
In recent years organic solar cells (SCs) have reached power conversion efficiencies above 10% [1]. Organic photovoltaics is indeed an intensively pursued research field because it promises high efficiency and low cost SCs. Organic materials have unique and useful optoelectronic properties, their chemical synthesis can be cheap and easy, and can be deposited in the form of thin films even on flexible plastic substrates by simple deposition techniques such as spinning, ink-jet printing and high vacuum thermal evaporation. Here we report results of the photovoltaic characterization of organic SCs having the donor (D)/acceptor (A) heterojunction structure [2]. The SCs, fabricated by vacuum the…
Measurements of cardiac Pre-Ejection period using a combo PPG-ECG system
The extraction of biomedical parameters, for early disease detection, is assuming today an ever increasing and fundamental importance. In particular, in the cardiologic field, the preejection period (PEP) is the duration of the iso-volumetric left ventricle contraction until the aortic valve opening. This parameter is a non-constant additive delay, which rapidly changes in response to stress, emotion and physical effort. To estimate this period, several wearable electronics devices have been developed in literature, and among them the Impedance Cardiogram equipment is the most used. However, these systems are often expensive and bulky. In this paper, we propose a cost-effective and easy to …