In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 20 ( 2022), p. 10865-10871
Abstract:
Strain is ubiquitous in perovskite based photovoltaic cells, but can be hardly well released in most perovskite films, which usually has an adverse effect on devices' performance and lifetime. Here, a molecular buffer interface that enabled strain-free hybrid perovskite films is demonstrated via a sequential deposition method. A quaternary ammonium iodide buffer layer can effectively release the in-plane tensile stress of PbI 2 via its flexibility and weak interaction, which enlarges the PbI 2 layer spacing and favors the subsequent perovskite phase conversion. Drift-diffusion simulations further suggest optimized interfacial band edges after the removal of residual PbI 2 , which enhances the charge extraction of solar cell devices. The optimized perovskite solar cell device attains an efficiency of 22.14% with a high fill factor of 0.846 and good long-term stability.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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