In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 9, No. 40 ( 2021), p. 23019-23027
Abstract:
Organic–inorganic hybrid lead halide perovskite solar cells (PSCs) attracted tremendous interest due to their excellent photovoltaic performance, but they still suffer from the poor long-term stability. Here, a penetrated 2D/3D heterojunction strategy is developed to stabilize the crystal structure at both the surface as well as grain boundaries and suppress non-radiative recombination. The organic halide with a large cation, namely dimethylammonium iodide (DMAI), was reported to achieve such a penetrated 2D/3D heterojunction through a simple post-treatment approach. Under this circumstance, the efficiency of Cs 0.05 FA 0.85 MA 0.10 Pb(I 0.90 Br 0.10 ) 3 PSCs was improved from 19.83% to ∼22% due to the significantly increased open-circuit voltage ( V oc ). In addition, we demonstrated the versatility of such a strategy in Cs 0.05 FA 0.85 MA 0.10 Pb(I 0.97 Br 0.03 ) 3 PSCs, leading to a champion efficiency approaching 23%. More importantly, the penetrated 2D/3D heterojunction can effectively protect the underlying 3D perovskite from moisture invasion. After ageing in air for 1000 hours, the device based on the 2D/3D heterojunction retained 80% of its initial efficiency, while the control device only maintained 57%.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
2702232-8
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