文献类型：期刊文献

英文题名：In situ growth of graphene on both sides of a Cu-Ni alloy electrode for perovskite solar cells with improved stability

作者：Lin, Xuesong[1];Su, Hongzhen[1];He, Sifan[2];Song, Yenan[3];Wang, Yanbo[1];Qin, Zhenzhen[1];Wu, Yongzhen[3];Yang, Xudong[1];Han, Qifeng[1];Fang, Junfeng[2];Zhang, Yiqiang[4];Segawa, Hiroshi[5];Graetzel, Michael[6];Han, Liyuan[1,4,5]

机构：[1]Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai, Peoples R China;[2]East China Normal Univ, Sch Phys & Elect Sci, Engn Res Ctr Nanophoton & Adv Instrument, Minist Educ, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat & Inst Fine Chem, Shanghai, Peoples R China;[4]Zhengzhou Univ, Henan Inst Adv Technol, Sch Mat Sci & Engn, Zhengzhou, Peoples R China;[5]Univ Tokyo, Coll Arts & Sci, Komaba Org Educ Excellence, Special Div Environm & Energy Sci, Tokyo, Japan;[6]Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn, Lab Photon & Interfaces, Lausanne, Switzerland

年份：2022

卷号：7

期号：6

起止页码：520

外文期刊名：NATURE ENERGY

收录：;EI(收录号：20222212183256);WOS:【SCI-EXPANDED(收录号:WOS:000802955400002)】；

基金：We thank Z. Bao and Y. Han from the Instrumental Analysis Center of Shanghai Jiao Tong University (China) for assistance with SEM measurements; J. Ding from the Instrumental Analysis Center of Shanghai Jiao Tong University (China) for assistance with time-of-flight secondary ion mass spectroscopy measurements; X. Ding and N. Zhang from the Instrumental Analysis Center of Shanghai Jiao Tong University (China) for assistance with XPS and ultraviolet photoelectron spectroscopy measurements; R. Wang from the Instrumental Analysis Center of Shanghai Jiao Tong University (China) and K. Jiang from the Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University (China) for assistance with Raman spectra measurements; X. Liu and Y. Liu from the Instrumental Analysis Center of Shanghai Jiao Tong University (China) for assistance with GC-MS measurements; and Y. Liu and Y. Li from the Instrumental Analysis Center of Shanghai Jiao Tong University (China) for assistance with static contact angle measurements. Funding was provided by the and National Key R&D Program of China grant 2020YFB1506400 (Q.H.), National Natural Science Foundation of China grant 11834011 (L.H.), National Natural Science Foundation of China grant 12074245 (L.H.), National Natural Science Foundation of China grant 52102281 (Y. Wang) and Shanghai Sailing Program grant 21YF1421600 (Y. Wang).

语种：英文

外文关键词：Adhesives - Chemical vapor deposition - Efficiency - Electrodes - Graphene - Hot pressing - Nickel alloys - Perovskite

摘要：The instability of rear electrodes undermines the long-term operational durability of efficient perovskite solar cells. Here, a composite electrode of copper-nickel (Cu-Ni) alloy stabilized by in situ grown bifacial graphene is designed. The alloying makes the work function of Cu suitable for regular perovskite solar cells. Cu-Ni is the ideal substrate for preparing high-quality graphene via chemical vapour deposition, which simultaneously protects the device from oxygen, water and reactions between internal components. To rivet the composite electrode with the semi-device, a thermoplastic copolymer is applied as an adhesive layer through hot pressing. The resulting devices achieve power conversion efficiencies of 24.34% and 20.76% (certified 20.86%) with aperture areas of 0.09 and 1.02 cm(2), respectively. The devices show improved stability: 97% of their initial efficiency is retained after 1,440 hours of a damp-heat test at 85 degrees C with a relative humidity of 85%; 95% of their initial efficiency is retained after 5,000 hours at maximum power point tracking under continuous 1 sun illumination. The instability of contact layers for perovskite solar cells under operating conditions limits the deployment of the technology. Now, Lin et al. develop a Cu-Ni electrode sandwiched between in situ-grown graphene protective layers, enabling solar cells with improved stability under light, humidity and high temperature.