Bio

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.

Research Description

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.Visit ResearchGate to download many of the papers in pdf.

Publications

Complete list of publications

Selected Publications

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, (2016), doi:10.1021/acsami.6b11232

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, (2016), doi:10.1002/adma.201604603

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, (2016), 7451, doi:10.1021/acs.chemmater.6b03083

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, (2016), 8005-8013, doi:10.1021/acs.jpcc.6b01498

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, (2015), A779-A790, doi:10.1364/OE.23.00A779

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, (2013), 8440, doi:10.1021/am401798g

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, (2013), 8225, doi:10.1021/am402363r

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, doi:10.1088/0022-3727/46/2/024008

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, (2012), 3846, doi:10.1021/am300549v

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, (2012), 253903, doi:10.1063/1.4729861