Abdi-Jalebi, M;
Dar, MI;
Senanayak, SP;
Sadhanala, A;
Andaji-Garmaroudi, Z;
Pazos-Outon, LM;
Richter, JM;
... Friend, RH; + view all
(2019)
Charge extraction via graded doping of hole transport layers gives highly luminescent and stable metal halide perovskite devices.
Science Advances
, 5
(2)
, Article eaav2012. 10.1126/sciadv.aav2012.
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Charge extraction via graded doping of hole transport layers gives highly luminescent and stable metal halide perovskite dev.pdf - Published Version Download (1MB) | Preview |
Abstract
One source of instability in perovskite solar cells (PSCs) is interfacial defects, particularly those that exist between the perovskite and the hole transport layer (HTL). We demonstrate that thermally evaporated dopant-free tetracene (120 nm) on top of the perovskite layer, capped with a lithium-doped Spiro-OMeTAD layer (200 nm) and top gold electrode, offers an excellent hole-extracting stack with minimal interfacial defect levels. For a perovskite layer interfaced between these graded HTLs and a mesoporous TiO2 electron-extracting layer, its photoluminescence yield reaches 15% compared to 5% for the perovskite layer interfaced between TiO2 and Spiro-OMeTAD alone. For PSCs with graded HTL structure, we demonstrate efficiency of up to 21.6% and an extended power output of over 550 hours of continuous illumination at AM1.5G, retaining more than 90% of the initial performance and thus validating our approach. Our findings represent a breakthrough in the construction of stable PSCs with minimized nonradiative losses.
| Type: | Article |
|---|---|
| Title: | Charge extraction via graded doping of hole transport layers gives highly luminescent and stable metal halide perovskite devices |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/sciadv.aav2012 |
| Publisher version: | http://dx.doi.org/10.1126/sciadv.aav2012 |
| Language: | English |
| Additional information: | Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | FIELD-EFFECT TRANSISTORS, SOLAR-CELLS, TRIPLET EXCITONS, INTERFACE, STABILITY, TETRACENE, EFFICIENT, PERFORMANCE, DEGRADATION, PENTACENE |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10092552 |
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