Enhancing Light Utilization Efficiency of Semi-Transparent Perovskite Solar Cells via Tailored Interfacial Engineering

被引:23
作者
Sharma, Bhavna [1 ]
Garai, Rabindranath [1 ]
Afroz, Mohammad Adil [1 ]
Sharma, Tejasvini [1 ]
Choudhary, Shivani [1 ]
Singh, Rajiv Kumar [2 ]
Satapathi, Soumitra [1 ,3 ]
机构
[1] Indian Inst Technol Roorkee, Dept Phys, Haridwar 247667, Uttarakhand, India
[2] CSIR Natl Phys Lab, Photovolta Metrol Sect, Adv Mat & Device Metrol Div, Dr K S Krishnan Marg, New Delhi 110012, India
[3] Indian Inst Technol Roorkee, Ctr Sustainable Energy, Roorkee 247667, Uttarakhand, India
关键词
average visible transparency; defect passivation; light utilizing efficiency; semitransparent perovskite solar cells; thin film crystallinity;
D O I
10.1002/aenm.202402473
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Semi-transparent perovskite solar cells (ST-PSCs) are promising for their application in building integrated photovoltaics (BIPVs). For BIPVs, a light utilization efficiency (LUE) > 2.5 is required which is multiplication of average visible transmittance (AVT) and power conversion efficiency (PCE). Generally, semitransparency is achieved by reducing film thickness which increases AVT but decreases PCE resulting in lower LUE. Here, an interface engineering strategy is employed on a wide bandgap perovskite thin absorber layer to increase PCE and LUE. The study employs three different alkylamine hydrochlorides molecules with varied alkyl chain length, viz., 2-chloroethylamine-hydrochloride, 3-chloropropylamine-hydrochloride, and 4-chlorobutyalamine-hydrochloride at perovskite/electron transport layer (ETL) interface and investigates their effect on perovskite crystallization. Further, it is demonstrated that 4-chlorobutyalamine-hydrochloride can strongly interact with perovskite and suppress non-radiative recombination facilitating charge transport at the perovskite/ETL interface. Devices post-treated with 4-chlorobutyalamine-hydrochloride interfacial layer, demonstrate a higher LUE of 3.45% (PCE 14.11%) and AVT of approximate to 25% (400-800 nm), with V-oc of 1.23 V. Moreover, the unencapsulated devices retain approximate to 89% of the initial efficiency after storage for 1500 h under a relative humidity of approximate to 35-40%. This study provides an efficient approach to improve LUE and stability of ST-PSCs for the application in energy-efficient smart windows.
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页数:11
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