Perovskite–organic tandem solar cells with indium oxide interconnect

Perovskite–organic tandem solar cells with indium oxide interconnect

Multijunction solar cells can overcome the fundamental efficiency limits of single-junction devices. The bandgap tunability of metal halide perovskite solar cells renders them attractive for multijunction architectures 1 . Combinations with silicon and copper indium gallium selenide (CIGS), as well...

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Published in:Nature (London) Vol. 604; no. 7905; pp. 280 - 286
Main Authors: Brinkmann, K. O., Becker, T., Zimmermann, F., Kreusel, C., Gahlmann, T., Theisen, M., Haeger, T., Olthof, S., Tückmantel, C., Günster, M., Maschwitz, T., Göbelsmann, F., Koch, C., Hertel, D., Caprioglio, P., Peña-Camargo, F., Perdigón-Toro, L., Al-Ashouri, A., Merten, L., Hinderhofer, A., Gomell, L., Zhang, S., Schreiber, F., Albrecht, S., Meerholz, K., Neher, D., Stolterfoht, M., Riedl, T.
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 14-04-2022
Nature Publishing Group
Subjects:
132/122
140/146
142/136
639/301/119/544
639/301/299/946
639/4077/4072/4062
639/4077/909/4101/4096/946
639/925/927/1007
Calcium Compounds
Copper
Copper indium gallium selenides
Efficiency
Excitons
Fullerenes
Gallium
Humanities and Social Sciences
Indium
Indium oxides
Light emitting diodes
Metal halides
Morphology
multidisciplinary
Open circuit voltage
Organic semiconductors
Oxides
Perovskites
Photovoltaic cells
Polymers
Quantum efficiency
Science
Science (multidisciplinary)
Selenide
Silicon
Solar cells
Titanium
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Summary:Multijunction solar cells can overcome the fundamental efficiency limits of single-junction devices. The bandgap tunability of metal halide perovskite solar cells renders them attractive for multijunction architectures 1 . Combinations with silicon and copper indium gallium selenide (CIGS), as well as all-perovskite tandem cells, have been reported 2 – 5 . Meanwhile, narrow-gap non-fullerene acceptors have unlocked skyrocketing efficiencies for organic solar cells 6 , 7 . Organic and perovskite semiconductors are an attractive combination, sharing similar processing technologies. Currently, perovskite–organic tandems show subpar efficiencies and are limited by the low open-circuit voltage ( V oc ) of wide-gap perovskite cells 8 and losses introduced by the interconnect between the subcells 9 , 10 . Here we demonstrate perovskite–organic tandem cells with an efficiency of 24.0 per cent (certified 23.1 per cent) and a high V oc of 2.15 volts. Optimized charge extraction layers afford perovskite subcells with an outstanding combination of high V oc and fill factor. The organic subcells provide a high external quantum efficiency in the near-infrared and, in contrast to paradigmatic concerns about limited photostability of non-fullerene cells 11 , show an outstanding operational stability if excitons are predominantly generated on the non-fullerene acceptor, which is the case in our tandems. The subcells are connected by an ultrathin (approximately 1.5 nanometres) metal-like indium oxide layer with unprecedented low optical/electrical losses. This work sets a milestone for perovskite–organic tandems, which outperform the best p–i–n perovskite single junctions 12 and are on a par with perovskite–CIGS and all-perovskite multijunctions 13 . A thin low-loss indium oxide interconnect layer grown by atomic layer deposition enables perovskite–organic hybrid tandem solar cells with a high open-circuit voltage and a high power conversion efficiency.
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content type line 23
ISSN:0028-0836
1476-4687
DOI:10.1038/s41586-022-04455-0