Research Assistant Professor
Professor Dinku's research is focused on understanding the working principles of organic bulk heterojunction solar cells and apply the knowledge thereof to fabricate optimized devices. He earned his PhD in 2006 in the Organic and Biomolecular Electronics division of Linköping University (Sweden), and he did his postdoctoral research in the Materials Research Institute of Hasselt University (Belgium) and in the Chemistry/Physics departments at UNC-Chapel Hill. He joined the Organic and Carbon Electronics Lab (ORaCEL) at NCSU, department of Physics, in October 2014.
His research involves, but not limited to, fabrication and characterization of organic solar cells, investigating the role of material structure-property relationships (on charge transport, recombination, interfacial charge transfer states, etc), and the critical role of interface buffer layers in organic inverted photovoltaic devices.
Select Publications | Full list: Google Scholar link
Visit ResearchGate to download many of the papers in pdf.
Role of Near Substrate and Bulk Polymer Morphology on Out-of-Plane Space-Charge Limited Hole Mobility
Johnathan Turner, Abay Gadisa, ACS Appl. Mater. Interfaces, DOI: 10.1021/acsami.6b11232 (2016).
Panchromatic Sequentially Cast Ternary Polymer Solar Cells
M. Ghasemi, L. Ye, Q. Zhang, L. Yan, J.-H. Kim, O. Awartani, W. You, A. Gadisa, and H. Ade, Adv. Mater. DOI: 10.1002/adma.201604603 (2016).
High Performance Organic Solar Cells Processed by Blade Coating in Air from a Benign Food Additive Solution
L. Ye, Y. Xiong, H. Yao, A. Gadisa, H. Zhang, S. Li, M. Ghasemi, N. Balar, A. Hunt, B. T. O’Connor, J. Hou, and H. Ade, Chem. Mater. 28, 7451 (2016).
Gains and Losses in PbS Quantum Dot Solar Cells with Submicron Periodic Grating Structures
Y. Hara, A. Gadisa, Y. Fu, T. Garvey, K. T. Vrouwenvelder, C. W. Miller, J. L. Dempsey, R. Lopez, J. Phys. Chem. C , 120, 8005-8013 (2016).
Modeling photovoltaic performance in periodic patterned colloidal quantum dot solar cells
Y. Fu, A. Gadisa, Y. Hara, C. W. Miller, K. T. Vrouwenvelder, R. Lopez, Optics express , 23, A779-A790 (2015).
Solution processed Al-doped ZnO nanoparticles/TiOx composite for highly efficient inverted organic solar cells
A. Gadisa, T. Hairfield, L. Alibabaei, C. L. Donley, E. T. Samulski, and R. Lopez, ACS Appl. Mater. Interfaces , 5, 8440 (2013).
Modifications in Morphology Resulting from Nanoimprinting Bulk Heterojunction Blends for Light Trapping Organic Solar Cell Designs
J. R. Tumbleston, A. Gadisa, Y. Liu, B. A. Collins, E. T. Samulski, R. Lopez, and H. Ade, ACS Appl. Mater. Interfaces , 5, 8225 (2013).
Effects of nano-patterned versus simple flat active layers in upright organic photovoltaic devices
Y. Liu, C. Kirsch, A. Gadisa, M. Aryal, S. Mitran, E. T. Samulski and R. Lopez, J. Phys. D: Appl. Phys. 46 (2013) 024008.
Role of thin n-type metal-oxide interlayers in inverted organic solar cells
A. Gadisa, Y. Liu, E. T. Samulski, ACS Appl. Mater. Inter. 4, 3846 (2012).
Minimizing interfacial losses in inverted organic solar cells comprising Al-doped ZnO
A. Gadisa, Y. Liu, E. T. Samulski, and R. Lopez, Appl. Phys. Lett. 100, 253903 (2012).