Quantum dot-induced phase stabilization of α-CsPbI₃ perovskite for high-efficiency photovoltaics
We show nanoscale phase stabilization of CsPbl₃ quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices. CsPbl₃ is an all-inorganic analog to the hybrid organic cation halide perovskites, but the cubic phase of bulk CsPbl₃ (α-CsPbl₃)—the va...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2016-10, Vol.354 (6308), p.92-95 |
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| container_title | Science (American Association for the Advancement of Science) |
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| creator | Swarnkar, Abhishek Marshall, Ashley R. Sanehira, Erin M. Chernomordik, Boris D. Moore, David T. Christians, Jeffrey A. Chakrabarti, Tamoghna Luther, Joseph M. |
| description | We show nanoscale phase stabilization of CsPbl₃ quantum dots (QDs) to low temperatures that can be used as the active component of efficient optoelectronic devices. CsPbl₃ is an all-inorganic analog to the hybrid organic cation halide perovskites, but the cubic phase of bulk CsPbl₃ (α-CsPbl₃)—the variant with desirable band gap—is only stable at high temperatures. We describe the formation of α-CsPbl₃ QD films that are phase-stable for months in ambient air. The films exhibit long-range electronic transport and were used to fabricate colloidal perovskite QD photovoltaic cells with an open-circuit voltage of 1.23 volts and efficiency of 10.77%. These devices also function as light-emitting diodes with low turn-on voltage and tunable emission. |
| doi_str_mv | 10.1126/science.aag2700 |
| format | Article |
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| source | Science Magazine; Jstor Complete Legacy |
| subjects | Cations Electric potential Energy gaps (solid state) MATERIALS SCIENCE nanocrystal solar cells perovskite solar cells Perovskites Photonic band gaps Photovoltaic cells quantum dot solar cells Quantum dots Solar cells SOLAR ENERGY |
| title | Quantum dot-induced phase stabilization of α-CsPbI₃ perovskite for high-efficiency photovoltaics |
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