Moisture pretreatment and hot-air annealing for improving the performance of perovskite solar cells

Countdown
0 days

Important Dates

Conference:

Apr. 22-24, 2019

Full Paper Due: Mar. 18, 2019

Abstract Due: Mar. 18, 2019

Audience Registration Due:
Apr. 22, 2019

Presentations of The Spring World Congress on Engineering and Technology (SCET 2017)

● Moisture pretreatment and hot-air annealing for improving the performance of perovskite solar cells
Author(s)
Yanliang Liu
Affiliation(s)
Department of Physics, Pukyong National University, Busan 48513, South Korea
KEYWORDS
Moisture pretreatment, hot-air annealing, perovskite solar cells
ABSTRACT
We report a simple and effective method for improving the performance of CH3NH3PbI3−xClx perovskite solar cells. By employing a moisture pretreatment (MPT) and a novel hot-air annealing process (HAAP) for preparing the perovskite CH3NH3PbI3-xClx film, we could successfully enhance the crystallinity of the CH3NH3PbI3-xClx active layer and improve its photon collection properties. This led to a marked improvement in device performance. Solar cells with the structure indium tin oxide/poly(3,4-ethylenedioxythiophene) -poly(styrenesulfonate)/CH3NH3PbI3-xClx active layer/[6,6]-phenyl-C61-butyric acid methyl ester/Ca/Al and fabricated using the MPT process and the HAAP method showed significantly improved performance, including higher power conversion efficiency (PCE) and fill factor values than those of the device fabricated conventionally. The PCE increased from 9.05 to 11.87% when the MPT process was used and from 9.05 to 15.55% when both MPT and HAAP were used. Moreover, the HAAP device did not exhibit photocurrent hysteresis, which is always observed in the case of the conventionally fabricated solar cells owing to the charge traps resulting from the low quality of the perovskite film.