In:
Nanoscale, Royal Society of Chemistry (RSC), Vol. 6, No. 17 ( 2014), p. 10281-10288
Abstract:
In this paper, we describe relationships between the morphologies and the power conversion efficiencies (PCE) of perovskite photovoltaics having a conventional p–i–n heterojunction structure, indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS)/CH 3 NH 3 PbI 3− x Cl x /PC 61 BM/Al. The PCE of such a device is highly dependent on the morphology of the perovskite film, which is governed by the concentrations of its precursors and the annealing conditions. A two-step annealing process allowed sufficient crystallization of the perovskite material, with a high coverage at a high precursor concentration. Relative to the device prepared using a one-step process (90 °C for 30 min), we observed a 60% increase in PCE for this optimized device. The corresponding devices exhibited extremely high stability after long-term storage ( 〉 1368 h) in the dark in a N 2 -filled glove box, with consistently high PCEs (AM 1.5G, 100 mW cm −2 ) of up to 9.1%.
Type of Medium:
Online Resource
ISSN:
2040-3364
,
2040-3372
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2014
detail.hit.zdb_id:
2515664-0
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