Premium
Series Resistance Measurements of Perovskite Solar Cells Using J sc – V oc Measurements
Author(s) -
Mundhaas Noemi,
Yu Zhengshan J.,
Bush Kevin A.,
Wang HsinPing,
Häusele Jakob,
Kavadiya Shalinee,
McGehee Michael D.,
Holman Zachary C.
Publication year - 2019
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201800378
Subject(s) - perovskite (structure) , equivalent series resistance , hysteresis , materials science , silicon , open circuit voltage , solar cell , gallium arsenide , analytical chemistry (journal) , voltage , optoelectronics , chemistry , condensed matter physics , crystallography , electrical engineering , physics , organic chemistry , engineering
The fill factor ( FF ) of perovskite solar cells is considerably lower than that of gallium arsenide and silicon cells, though they have similar open‐circuit voltage deficits. To probe the FF loss, which mainly comes from series resistance, the J sc – V oc characterization technique is applied to perovskite solar cells. A continuous‐lamp solar simulator with an array of neutral density filters is used instead of the quasi‐steady‐state photoconductance technique commonly employed for silicon cells, which allows us to tune sweep parameters to accommodate the complex behavior of perovskites such as hysteresis. It is found that, for Cs 0.25 FA 0.75 Pb(Br 0.2 I 0.8 ) 3 (CsFA) perovskite cells, sweeping from positive to negative voltage yields the same series resistance regardless of sweep speed, whereas this is not the case if the sweep is reversed. However, for CH 3 NH 3 PbI 3 perovskite cells, the series resistance is independent of the sweep speed in both sweep directions. It is also found that, for a poly[bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine] (PTAA) hole contact, increasing the PTAA thickness barely changes the recombination‐limited pseudo‐ FF , but reduces the FF due to increased series resistance. A maximum FF of 80.9% was achieved with the PTAA hole contact on a CsFA perovskite absorber.