In:
Advanced Functional Materials, Wiley, Vol. 26, No. 33 ( 2016-09), p. 6069-6075
Abstract:
Perovskite solar cells (PSCs) may offer huge potential in photovoltaic conversion, yet their practical applications face one major obstacle: their low stability, or quick degradation of their initial efficiencies. Here, a new design scheme is presented to enhance the PSC stability by using low‐temperature hydrothermally grown hierarchical nano‐SnO 2 electron transport layers (ETLs). The ETL contains a thin compact SnO 2 layer underneath a mesoporous layer of SnO 2 nanosheets. The mesoporous layer plays multiple roles of enhancing photon collection, preventing moisture penetration and improving the long‐term stability. Through such simple approaches, PSCs with power conversion efficiencies of ≈13% can be readily obtained, with the highest efficiency to be 16.17%. A prototypical PSC preserves 90% of its initial efficiency even after storage in air at room temperature for 130 d without encapsulation. This study demonstrates that hierarchical SnO 2 is a potential ETL for fabricating low‐cost and efficient PSCs with long‐term stability.
Type of Medium:
Online Resource
ISSN:
1616-301X
,
1616-3028
DOI:
10.1002/adfm.201600910
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
2029061-5
detail.hit.zdb_id:
2039420-2
SSG:
11
