In:
Science, American Association for the Advancement of Science (AAAS), Vol. 354, No. 6314 ( 2016-11-18), p. 861-865
Abstract:
We demonstrate four- and two-terminal perovskite-perovskite tandem solar cells with ideally matched band gaps. We develop an infrared-absorbing 1.2–electron volt band-gap perovskite, FA 0.75 Cs 0.25 Sn 0.5 Pb 0.5 I 3 , that can deliver 14.8% efficiency. By combining this material with a wider–band gap FA 0.83 Cs 0.17 Pb(I 0.5 Br 0.5 ) 3 material, we achieve monolithic two-terminal tandem efficiencies of 17.0% with 〉 1.65-volt open-circuit voltage. We also make mechanically stacked four-terminal tandem cells and obtain 20.3% efficiency. Notably, we find that our infrared-absorbing perovskite cells exhibit excellent thermal and atmospheric stability, not previously achieved for Sn-based perovskites. This device architecture and materials set will enable “all-perovskite” thin-film solar cells to reach the highest efficiencies in the long term at the lowest costs.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.aaf9717
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2016
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11
