117 citations · 665 across the 19 of their papers we have counts for
19 papers
Thermal analysis of metal organic precursors for functional Cu doped NiOx hole transporting layer in inverted perovskite solar cells the role of solution combustion chemistry in Cu doped NiOx thin films processing
Apostolos Ioakeimidis, Ioannis T. Papadas, Eirini D. Koutsouroubi +2
Low temperature solution combustion synthesis emerges as a facile method for synthesis of functional metal oxides thin films for electronic applications. We study the solution comb…
All Inorganic p_n Heterojunction Solar Cells by Solution Combustion Synthesis using n_type FeMnO3 Perovskite Photoactive Layer
Ioannis T. Papadas, Apostolos Ioakeimidis, Ioannis Vamvasakis +3
This study outlines the synthesis and physicochemical characteristics of a solution-processable iron manganite (FeMnO3) nanoparticles via a chemical combustion method using tartart…
Bottom Contact Metal Oxide Interface Modification Improving the Efficiency of Organic Light Emitting Diodes
Sergey M. Pozov, Apostolos Ioakeimidis, Ioannis T. Papadas +4
The performance of solution-processed organic light emitting diodes (OLEDs) is often limited by non-uniform contacts. In this work, we introduce Ni-containing solution-processed me…
Surface Treatment of Cu:NiOx Hole-Transporting Layer Using \b{eta}-Alanine for Hysteresis-Free and Thermally Stable Inverted Perovskite Solar Cells
Fedros Galatopoulos, Ioannis T. Papadas, Apostolos Ioakeimidis +2
Inverted perovskite solar cells (PSCs) using a Cu:NiOx hole transporting layer (HTL) often exhibit stability issues and in some cases J/V hysteresis. In this work, we developed a \…
Nitrobenzene as Additive to Improve Reproducibility and Degradation Resistance of Highly Efficient Methylammonium-Free Inverted Perovskite Solar Cells
Apostolos Ioakeimidis, Stelios. A. Choulis
We show that the addition of 1 % (v/v) nitrobenzene within the perovskite formulation can be used as a method to improve the power conversion efficiency and reliability performance…
Nanoparticulate Metal Oxide Top Electrode Interface Modification Improves the Thermal Stability of Inverted Perovskite Photovoltaics
Ioannis T. Papadas, Fedros Galatopoulos, Gerasimos S. Armatas +2
Solution processed γ-Fe2O3 nanoparticles via the solvothermal colloidal synthesis in conjunction with ligand-exchange method are used for interface modification of the top electrod…
Antimony doped Tin Oxide/Polyethylenimine Electron Selective Contact for reliable and light soaking-free high Performance Inverted Organic Solar Cells
Efthymios Georgiou, Ioannis T. Papadas, Ioanna Antoniou +5
We have demonstrated a high-performance low temperature solution processed electron selective contact consisting of 10 at% antimony doped tin oxide (ATO) and the neutral polymer po…
Enhanced Photovoltaic Performance of Perovskite Solar Cells by Co-Doped Spinel Nickel Cobaltite Hole Transporting Layer
Apostolos Ioakeimidis, Ioannis T. Papadas, Dimitris Tsikritzis +3
Solution combustion synthesized hole transport layer of co-doped spinel nickel cobaltite were fabricated using doctor-blading technique for planar inverted perovskite solar cells.…
Inverted Perovskite Photovoltaics using Flame Spray Pyrolysis Solution based CuAlO2/Cu-O Hole Selective Contact
Achilleas Savva, Ioannis T. Papadas, Dimitris Tsikritzis +10
We present the functionalization process of a conductive and transparent copper aluminum oxide, copper oxide alloy. The copper aluminum oxide, copper oxide powders were developed b…
Long Thermal Stability of Inverted Perovskite Photovoltaics Incorporating Fullerene-based Diffusion Blocking Layer
Fedros Galatopoulos, Ioannis T. Papadas, Gerasimos S. Armatas +1
In this article, the stability of p-i-n perovskite solar cells is studied under accelerated heat lifetime conditions (60 oC ,85oC and N2 atmosphere). By using a combination of buff…
Influence of the Hole Transporting Layer on the Thermal Stability of Inverted Organic Photovoltaics Using Accelerated Heat Lifetime Protocols
Felix Hermerschmidt, Achilleas Savva, Efthymios Georgiou +7
High power conversion efficiency (PCE) inverted organic photovoltaics (OPVs) usually use thermally evaporated MoO3 as a hole transporting layer (HTL). Despite the high PCE values r…
The Effect of Hole Transporting Layer in Charge Accumulation Properties of p-i-n Perovskite Solar Cells
Fedros Galatopoulos, Achilleas Savva, Ioannis T. Papadas +1
The charge accumulation properties of p-i-n perovskite solar cells were investigated using three representative organic and inorganic hole transporting layer (HTLs): a) Poly(3,4-et…
Room Temperature Nanoparticulate Interfacial Layers for Perovskite Solar Cells via solvothermal synthesis
Achilleas Savva, Ioannis T. Papadas, Dimitris Tsikritzis +3
We present a solvothermal synthetic route to produce monodispersed CuO nanoparticles (NPs) in the range of 5-10 nm that can be used as hole selective interfacial layer between indi…
The influence of additives in the stoichiometry of hybrid lead halide perovskites
Ignasi Burgués-Ceballos, Achilleas Savva, Efthymios Georgiou +6
We investigate the employment of carefully selected solvent additives in the processing of a commercial perovskite precursor ink and analyze their impact on the performance of orga…
Low Temperature Combustion Synthesis of a Spinel NiCo2O4 Hole Transport Layer for Perovskite Photovoltaics
Ioannis T. Papadas, Apostolos Ioakeimidis, Gerasimos S. Armatas +1
In the present study, we report the synthesis and characterization of a low-temperature solution-processable monodispersed nickel cobaltite (NiCo2O4) nanoparticles via a combustion…
Employing surfactant-assisted hydrothermal synthesis to control CuGaO2 nanoparticle formation and improved carrier selectivity of perovskite solar cells
Ioannis T. Papadas, Achilleas Savva, Apostolos Ioakeimidis +3
Delafossites like CuGaO2 have appeared as promising p-type semiconductor materials for opto-electronic applications mainly due to their high optical transparency and electrical con…
High Performance Inverted Organic Photovoltaics Without Hole Selective Contact
Achilleas Savva, Ignasi Burgues-Ceballos, Giannis Papazoglou +1
A detailed investigation of the functionality of inverted organic photovoltaics (OPVs) using bare Ag contacts as top electrode is presented. The inverted OPVs without hole transpor…
Improved Performance and Reliability of p-i-n Perovskite Solar Cells via Doped Metal Oxides
Achilleas Savva, Ignasi Burgues-Ceballos, Stelios A. Choulis
Perovskite photovoltaics (PVs) have attracted attention because of their excellent power conversion efficiency (PCE). Critical issues related to large area PV performance, reliabil…
Characterization of solution processed TiOx buffer layers in inverted organic photovoltaics by XPS and DFT studies
Ivan S. Zhidkov, Ernst Z. Kurmaev, Michel A. Korotin +5
We present the results of XPS measurements (core levels and valence bands) of solution processed TiOx thin films prepared from titanium butoxide (C16H36O4Ti) diluted in isopropanol…