4 research outputs found
Efficient organic-inorganic hybrid perovskite solar cells processed in air
Organic-inorganic hybrid perovskite solar cells with fluorine doped tin oxide/titanium dioxide/CH3NH3PbI3-xClx/poly(3-hexylthiophene)/silver were made in air with more than 50% humidity. The best devices showed an open circuit voltage of 640 mV, a short circuit current density of 18.85 mA cm-2, a fill factor of 0.407 and a power conversion efficiency of 5.67%. The devices showed external quantum efficiency varying from 60 to 80% over a wavelength region of 350 nm to 750 nm of the solar spectrum. The morphology of the perovskite was investigated using scanning electron microscopy and it was found to be porous in nature. This study provides insights into air-stability of perovskite solar cells
On the Uniqueness of Ideality Factor and Voltage Exponent of Perovskite-Based Solar Cells
Perovskite-based solar cells have
attracted much recent research
interest with efficiency approaching 20%. While various combinations
of material parameters and processing conditions are attempted for
improved performance, there is still a lack of understanding in terms
of the basic device physics and functional parameters that control
the efficiency. Here we show that perovskite-based solar cells have
two universal features: an ideality factor close to two and a space-charge-limited
current regime. Through detailed numerical modeling, we identify the
mechanisms that lead to these universal features. Our model predictions
are supported by experimental results on solar cells fabricated at
five different laboratories using different materials and processing
conditions. Indeed, this work unravels the fundamental operation principle
of perovskite-based solar cells, suggests ways to improve the eventual
performance, and serves as a benchmark to which experimental results
from various laboratories can be compared
TEQIP - III Sponsored First International Conference on Innovations and Challenges in Computing, Analytics and Security
This book contains abstracts of the various research papers of the academic & research community presented at the International Conference on Innovations and Challenges in Computing, Analytics and Security (ICICCAS-2020). ICICCAS-2020 has served as a platform for researchers, professionals to meet and exchange ideas on computing, data analytics, and security. The conference has invited papers in seven main tracks of Data Science, Networking Technologies, Sequential, Parallel, Distributed and Cloud Computing, Advances in Software Engineering, Multimedia, Image Processing, and Embedded Systems, Security and Privacy, Special Track (IoT, Smart Technologies and Green Engineering). The Technical and Advisory Committee Members were from various countries that have rich Research and Academic experience.
Conference Title: TEQIP - III Sponsored First International Conference on Innovations and Challenges in Computing, Analytics and SecurityConference Acronym: ICICCAS-2020Conference Date: 29-30 July 2020Conference Location: Pondicherry Engineering College, Puducherry – 605014, India (Virtual Mode)Conference Organizer: Department of Computer Science and Engineering, Pondicherry Engineering College, Puducherry, India.Conference Sponsor: TEQIP-III NPIU (A Unit of the Ministry of Human Resource Development, India)