Doctor of Philosophy, King Abdullah University of Science and Technology (2016)
- Acceptor Gradient Polymer Donors for Non-Fullerene Organic Solar Cells CHEMISTRY OF MATERIALS 2019; 31 (23): 9729–41
- Fullerene derivative induced morphology of bulk heterojunction blends: PIPCP:PC61BM RSC ADVANCES 2019; 9 (8): 4106–12
- Effect of Molecular Shape on the Properties of Non-Fullerene Acceptors: Contrasting Calamitic Versus 3D Design Principles ACS APPLIED ENERGY MATERIALS 2018; 1 (11): 6513–23
Reducing the efficiency-stability-cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells.
2017; 16 (3): 363-369
Technological deployment of organic photovoltaic modules requires improvements in device light-conversion efficiency and stability while keeping material costs low. Here we demonstrate highly efficient and stable solar cells using a ternary approach, wherein two non-fullerene acceptors are combined with both a scalable and affordable donor polymer, poly(3-hexylthiophene) (P3HT), and a high-efficiency, low-bandgap polymer in a single-layer bulk-heterojunction device. The addition of a strongly absorbing small molecule acceptor into a P3HT-based non-fullerene blend increases the device efficiency up to 7.7 ± 0.1% without any solvent additives. The improvement is assigned to changes in microstructure that reduce charge recombination and increase the photovoltage, and to improved light harvesting across the visible region. The stability of P3HT-based devices in ambient conditions is also significantly improved relative to polymer:fullerene devices. Combined with a low-bandgap donor polymer (PBDTTT-EFT, also known as PCE10), the two mixed acceptors also lead to solar cells with 11.0 ± 0.4% efficiency and a high open-circuit voltage of 1.03 ± 0.01 V.
View details for DOI 10.1038/nmat4797
View details for PubMedID 27869824