TY - JOUR
T1 - Elucidating the effect of shunt losses on the performance of mesoporous perovskite solar cells
AU - Singh, Ranbir
AU - Sandhu, Sanjay
AU - Lee, Jae Joon
N1 - Publisher Copyright:
© 2019 International Solar Energy Society
PY - 2019/11/15
Y1 - 2019/11/15
N2 - Mesoporous perovskite solar cells (MPSCs) suffer from various types of charge carrier losses, where shunt losses usually dominate. Herein, we perform a systematic study to investigate the impact of such losses on the photovoltaic performance of methylammonium lead iodide (MAPbI3)-based MPSCs. The shunt losses in the MPSCs are attributed to the leakage current and the non-geminated recombination losses. We also demonstrate that these losses can be reduced by the incorporation of appropriate thickness of compact titanium oxide (c-TiO2) interlayer between FTO and mesoporous TiO2 (m-TiO2). As a result, MPSCs exhibit higher open-circuit voltage (VOC) of 1.05 V, short-circuit current density (JSC) of 23.27 mA cm−2, and the power conversion efficiency (PCE) of 17.69% under one-sun illumination conditions. The improved device performance was attributed to (i) the efficient blocking of holes, (ii) the decrease of leakage current, and (iii) the suppression of the non-geminated recombination losses in the cells. The effect of the c-TiO2 layer thickness on the series resistance (RS), shunt resistance (RSh), and the non-geminated recombination were also discussed in detail.
AB - Mesoporous perovskite solar cells (MPSCs) suffer from various types of charge carrier losses, where shunt losses usually dominate. Herein, we perform a systematic study to investigate the impact of such losses on the photovoltaic performance of methylammonium lead iodide (MAPbI3)-based MPSCs. The shunt losses in the MPSCs are attributed to the leakage current and the non-geminated recombination losses. We also demonstrate that these losses can be reduced by the incorporation of appropriate thickness of compact titanium oxide (c-TiO2) interlayer between FTO and mesoporous TiO2 (m-TiO2). As a result, MPSCs exhibit higher open-circuit voltage (VOC) of 1.05 V, short-circuit current density (JSC) of 23.27 mA cm−2, and the power conversion efficiency (PCE) of 17.69% under one-sun illumination conditions. The improved device performance was attributed to (i) the efficient blocking of holes, (ii) the decrease of leakage current, and (iii) the suppression of the non-geminated recombination losses in the cells. The effect of the c-TiO2 layer thickness on the series resistance (RS), shunt resistance (RSh), and the non-geminated recombination were also discussed in detail.
KW - Electron transport layer
KW - Leakage current
KW - Non-geminated recombination losses
KW - Perovskite solar cell
KW - Series and shunt resistance
UR - http://www.scopus.com/inward/record.url?scp=85073743212&partnerID=8YFLogxK
U2 - 10.1016/j.solener.2019.10.018
DO - 10.1016/j.solener.2019.10.018
M3 - Article
AN - SCOPUS:85073743212
SN - 0038-092X
VL - 193
SP - 956
EP - 961
JO - Solar Energy
JF - Solar Energy
ER -