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16 results on '"Maurano, Andrea"'

4. Large Increase in External Quantum Efficiency by Dihedral Angle Tuning in a Sky‐Blue Thermally Activated Delayed Fluorescence Emitter

Author

Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Huang, Wenliang, Einzinger, Markus, Maurano, Andrea, Zhu, Tianyu, Tiepelt, Jan, Yu, Chao, Chae, Hyun Sik, Van Voorhis, Troy, Baldo, Marc A., Buchwald, Stephen L., Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Huang, Wenliang, Einzinger, Markus, Maurano, Andrea, Zhu, Tianyu, Tiepelt, Jan, Yu, Chao, Chae, Hyun Sik, Van Voorhis, Troy, Baldo, Marc A., and Buchwald, Stephen L.

Published
2022

6. V[subscript OC] enhancement in polymer solar cells with isobenzofulvene–C[subscript 60] adducts

Author

Han, Ggoch Ddeul, Maurano, Andrea, Weis, Jonathan Garrett, Bulovic, Vladimir, Swager, Timothy M, Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Research Laboratory of Electronics, Swager, Timothy M., Han, Ggoch Ddeul, Maurano, Andrea, Weis, Jonathan Garrett, Bulovic, Vladimir, and Swager, Timothy M

Abstract

We report the use of isobenzofulvene–C[subscript 60] adducts in bulk heterojunction organic solar cells, synthesized via the [4 + 2] cycloaddition of C[subscript 60] with an in situ generated isobenzofulvene intermediate. The LUMO energy levels of these adducts are 20–180 meV higher than that of PCBM ([6,6]-phenyl-C[subscript 61]-butyric acid methyl ester). This large increase of the LUMO level is attributed to cofacial π-orbital interactions between the fullerene surface and the isobenzofulvene π–system (aromatic ring and double bond). Raised LUMO levels of fullerenes, together with their desirably slow recombination dynamics, led to higher open-circuit voltages (V[subscript OC]) in bulk heterojunction polymer solar cells (up to 0.75 V for bisadducts) relative to cells tested in parallel using the well-known PCBM as the fullerene acceptor. In addition to enhanced V[subscript OC], the short-circuit current densities (J[subscriptSC]) were improved in the devices containing the epoxide analogs of the isobenzofulvene–C[subscript 60]. Notably the epoxide derivative of the monoadduct (IBF–Ep) exhibited ∼20% enhancement of power conversion efficiency (PCE) compared to reference P3HT:PCBM solar cells. A combination of optical and electronic methods was used to investigate the origin of the PCE enhancement observed with these new fullerene acceptors with particular attention to the increased V[subscript OC]s.

Published
2016

7. Open-Circuit Voltage Deficit, Radiative Sub-Bandgap States, and Prospects in Quantum Dot Solar Cells

Author

Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Research Laboratory of Electronics, Chuang, Chia-Hao Marcus, Maurano, Andrea, Brandt, Riley E, Hwang, Gyuweon, Jean, Joel, Buonassisi, Anthony, Bulovic, Vladimir, Bawendi, Moungi G, Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Research Laboratory of Electronics, Chuang, Chia-Hao Marcus, Maurano, Andrea, Brandt, Riley E, Hwang, Gyuweon, Jean, Joel, Buonassisi, Anthony, Bulovic, Vladimir, and Bawendi, Moungi G

Abstract

Quantum dot photovoltaics (QDPV) offer the potential for low-cost solar cells. To develop strategies for continued improvement in QDPVs, a better understanding of the factors that limit their performance is essential. Here, we study carrier recombination processes that limit the power conversion efficiency of PbS QDPVs. We demonstrate the presence of radiative sub-bandgap states and sub-bandgap state filling in operating devices by using photoluminescence (PL) and electroluminescence (EL) spectroscopy. These sub-bandgap states are most likely the origin of the high open-circuit-voltage (VOC) deficit and relatively limited carrier collection that have thus far been observed in QDPVs. Combining these results with our perspectives on recent progress in QDPV, we conclude that eliminating sub-bandgap states in PbS QD films has the potential to show a greater gain than may be attainable by optimization of interfaces between QDs and other materials. We suggest possible future directions that could guide the design of high-performance QDPVs., United States. Army Research Office. Institute for Soldier Nanotechnologies (Samsung Advanced Institute of Technology. Contract W911NF-13-D-0001), National Science Foundation (U.S.) (CAREER Award ECCS-1150878), National Science Foundation (U.S.). Graduate Research Fellowship Program

Published
2017

11. Understanding the influence of morphology on poly(3-hexylselenothiophene): PCBM solar cells

Author

Ballantyne, Amy M, Ferenczi, Toby, Campoy-Quiles, Mariano, Clarke, Tracey M, Maurano, Andrea, Wong, Kien Hon, Zhang, Weimin, Stingelin-Stutzmann, Natalie, Ji-Seon, Kim, Bradley, Donal, Ballantyne, Amy M, Ferenczi, Toby, Campoy-Quiles, Mariano, Clarke, Tracey M, Maurano, Andrea, Wong, Kien Hon, Zhang, Weimin, Stingelin-Stutzmann, Natalie, Ji-Seon, Kim, and Bradley, Donal

Published
2010

13. The role of alkane dithiols in controlling polymer crystallization in small band gap polymer:Fullerene solar cells

Author

Agostinelli, Tiziano, primary, Ferenczi, Toby A. M., additional, Pires, E., additional, Foster, Samuel, additional, Maurano, Andrea, additional, Müller, Christian, additional, Ballantyne, Amy, additional, Hampton, Mark, additional, Lilliu, Samuele, additional, Campoy-Quiles, Mariano, additional, Azimi, Hamed, additional, Morana, Mauro, additional, Bradley, Donal D. C., additional, Durrant, James, additional, Macdonald, J. Emyr, additional, Stingelin, Natalie, additional, and Nelson, Jenny, additional

Published
2011
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15. Recombination Dynamics as a Key Determinant of Open Circuit Voltage in Organic Bulk Heterojunction Solar Cells: A Comparison of Four Different Donor Polymers

Author

Maurano, Andrea, primary, Hamilton, Rick, additional, Shuttle, Chris G., additional, Ballantyne, Amy M., additional, Nelson, Jenny, additional, O’Regan, Brian, additional, Zhang, Weimin, additional, McCulloch, Iain, additional, Azimi, Hamed, additional, Morana, Mauro, additional, Brabec, Christoph J., additional, and Durrant, James R., additional

Published
2010
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16. Understanding the Influence of Morphology on Poly(3-hexylselenothiophene):PCBM Solar Cells

Author

Ballantyne, Amy M., primary, Ferenczi, Toby A. M., additional, Campoy-Quiles, Mariano, additional, Clarke, Tracey M., additional, Maurano, Andrea, additional, Wong, Kien Hon, additional, Zhang, Weimin, additional, Stingelin-Stutzmann, Natalie, additional, Kim, Ji-Seon, additional, Bradley, Donal D. C., additional, Durrant, James R., additional, McCulloch, Iain, additional, Heeney, Martin, additional, Nelson, Jenny, additional, Tierney, Steve, additional, Duffy, Warren, additional, Mueller, Christian, additional, and Smith, Paul, additional

Published
2010
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