Cost-efficient clamping solar cells using candle soot for hole extraction from ambipolar perovskites
- 12 August 2014
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Energy & Environmental Science
- Vol. 7 (10), 3326-3333
- https://doi.org/10.1039/c4ee01983k
Abstract
Ambient-unstable hole transporters and expensive and complicated noble metal electrode deposition are incompatible with the large scale and low-cost production of perovskite solar cells and thus would hamper their commercialization. Herein we report a new modality of perovskite solar cells that do away with the use of conventional hole transporters by directly clamping a selective hole extraction electrode made of candle soot and a deliberately engineered perovskite photoanode. The key soot/perovskite interface, which promotes hole extraction and electron blocking by forming a Schottky junction, was established seamlessly by pre-wetting and reaction embedding the carbon particles. Femtosecond time-resolved photoluminescence revealed a high hole extraction rate at 1.92 ns−1. We have now achieved 11.02% efficiency, making an important step towards roll-to-roll production of perovskite solar cells.This publication has 36 references indexed in Scilit:
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