TY - JOUR

T1 - Enhancing photovoltaic performance of perovskite solar cells with silica nanosphere antireflection coatings

AU - Luo, Qi

AU - Deng, Xueshuang

AU - Yu, Meidong

AU - Zhang, Chenxi

AU - Zhou, Xin

AU - Wang, Zengbo

AU - Chen, Xiaohong

AU - Huang, Sumei

PY - 2018/7/15

Y1 - 2018/7/15

N2 - Organic-inorganic halide perovskite solar cells have enormous potential to impact the existing photovoltaic industry. As realizing higher power conversion efficiency (PCE) of the solar cell is still the most crucial task, a great number of schemes were proposed to minimize the carrier loss by optimizing the electrical properties of the perovskite solar cells (PSCs). Here, we focus on another significant aspect that is to minimize the light loss by using an antireflection coating (ARC) component to gain a high PCE for PSC devices. In our scheme, silica nanosphere based ARCs are employed to CH3NH3PbI3PSCs for enhancing the device efficiency. SiO2nanosphere based ARCs were grown by spin-coating of an aged silica sol. The microstructure and the thickness of the SiO2 nanosphere based ARC were controlled by changing the spin-coating speed from 400 to 4000 rpm. The effect of SiO2 nanosphere based ARCs on the photovoltaic performance of perovskite solar cells is systematically investigated. The optimized SiO2 nanosphere ARC coating on cleaned glass substrate exhibited a maximum transmittance of 96.1% atλ= 550 nm wavelength, and averagely increased the transmittance by about 3.8% in a broadband of 400–800 nm. The optimized antireflection coating strongly suppressed broadband and wideangle reflectance in typical PSC solar cells, significantly enhancing the omnidirectional photovoltaic (PV) performance of PSCs. As a result, the power conversion efficiency was improved from 14.81% for reference device without SiO2nanospheres to 15.82% for the PSC device with the optimized ARC. Also, the PV performance of the PSC device with the optimized SiO2nanosphere ARC revealed less angular dependence for incident light.

AB - Organic-inorganic halide perovskite solar cells have enormous potential to impact the existing photovoltaic industry. As realizing higher power conversion efficiency (PCE) of the solar cell is still the most crucial task, a great number of schemes were proposed to minimize the carrier loss by optimizing the electrical properties of the perovskite solar cells (PSCs). Here, we focus on another significant aspect that is to minimize the light loss by using an antireflection coating (ARC) component to gain a high PCE for PSC devices. In our scheme, silica nanosphere based ARCs are employed to CH3NH3PbI3PSCs for enhancing the device efficiency. SiO2nanosphere based ARCs were grown by spin-coating of an aged silica sol. The microstructure and the thickness of the SiO2 nanosphere based ARC were controlled by changing the spin-coating speed from 400 to 4000 rpm. The effect of SiO2 nanosphere based ARCs on the photovoltaic performance of perovskite solar cells is systematically investigated. The optimized SiO2 nanosphere ARC coating on cleaned glass substrate exhibited a maximum transmittance of 96.1% atλ= 550 nm wavelength, and averagely increased the transmittance by about 3.8% in a broadband of 400–800 nm. The optimized antireflection coating strongly suppressed broadband and wideangle reflectance in typical PSC solar cells, significantly enhancing the omnidirectional photovoltaic (PV) performance of PSCs. As a result, the power conversion efficiency was improved from 14.81% for reference device without SiO2nanospheres to 15.82% for the PSC device with the optimized ARC. Also, the PV performance of the PSC device with the optimized SiO2nanosphere ARC revealed less angular dependence for incident light.

KW - Perovskite solar cells

KW - Antireflection coating

KW - Spin-coating

KW - Photovoltaics

KW - Low-cost and scalable approach

U2 - 10.1016/j.solener.2018.04.044

DO - 10.1016/j.solener.2018.04.044

M3 - Article

VL - 169

SP - 128

EP - 135

JO - Solar Energy

JF - Solar Energy

SN - 0038-092X

ER -