太阳能是一种清洁可再生能源,太阳能电池基于“光生伏特效应”能够将光能转换为电能,开发高效且稳定的太阳能电池是缓解能源危机、改善环境污染问题的重要举措。钙钛矿太阳能电池(perovskite solar cells, PSCs)具备带隙可调节、载流子...太阳能是一种清洁可再生能源,太阳能电池基于“光生伏特效应”能够将光能转换为电能,开发高效且稳定的太阳能电池是缓解能源危机、改善环境污染问题的重要举措。钙钛矿太阳能电池(perovskite solar cells, PSCs)具备带隙可调节、载流子寿命长、激子结合能小、吸光系数大以及缺陷容忍度高等特点。但PSCs中的重金属元素铅对人类健康和生态环境造成了危害,限制了铅基PSCs的进一步应用。本文主要介绍使用化学方法减少铅泄露,系统总结了铅隔离材料在PSCs封装层和功能层中的应用,并重点阐述了本课题组在防止铅泄露方面的研究工作,为有兴趣促进PSCs开发和应用的研究人员提供参考。展开更多
Sb_(2)Se_(3) with unique one-dimensional(1D) crystal structure exhibits exceptional deformation tolerance,demonstrating great application potential in flexible devices.However,the power conversion efficiency(PCE) of f...Sb_(2)Se_(3) with unique one-dimensional(1D) crystal structure exhibits exceptional deformation tolerance,demonstrating great application potential in flexible devices.However,the power conversion efficiency(PCE) of flexible Sb_(2)Se_(3) photovoltaic devices is temporarily limited by the complicated intrinsic defects and the undesirable contact interfaces.Herein,a high-quality Sb_(2)Se_(3) absorber layer with large crystal grains and benign [hkl] growth orientation can be first prepared on a Mo foil substrate.Then NaF intermediate layer is introduced between Mo and Sb_(2)Se_(3),which can further optimize the growth of Sb_(2)Se_(3)thin film.Moreover,positive Na ion diffusion enables it to dramatically lower barrier height at the back contact interface and passivate harmful defects at both bulk and heterojunction.As a result,the champion substrate structured Mo-foil/Mo/NaF/Sb_(2)Se_(3)/CdS/ITO/Ag flexible thin-film solar cell delivers an obviously higher efficiency of 8.03% and a record open-circuit voltage(V_(OC)) of 0.492 V.This flexible Sb_(2)Se_(3) device also exhibits excellent stability and flexibility to stand large bending radius and multiple bending times,as well as superior weak light photo-response with derived efficiency of 12.60%.This work presents an effective strategy to enhance the flexible Sb_(2)Se_(3) device performance and expand its potential photovoltaic applications.展开更多
文摘太阳能是一种清洁可再生能源,太阳能电池基于“光生伏特效应”能够将光能转换为电能,开发高效且稳定的太阳能电池是缓解能源危机、改善环境污染问题的重要举措。钙钛矿太阳能电池(perovskite solar cells, PSCs)具备带隙可调节、载流子寿命长、激子结合能小、吸光系数大以及缺陷容忍度高等特点。但PSCs中的重金属元素铅对人类健康和生态环境造成了危害,限制了铅基PSCs的进一步应用。本文主要介绍使用化学方法减少铅泄露,系统总结了铅隔离材料在PSCs封装层和功能层中的应用,并重点阐述了本课题组在防止铅泄露方面的研究工作,为有兴趣促进PSCs开发和应用的研究人员提供参考。
基金supported by the National Natural Science Foundation of China(Grant Nos.62104156,62074102)the Guangdong Basic and Applied Basic Research Foundation(Grant Nos.2023A1515011256,2022A1515010979)China+1 种基金Science and Technology plan project of Shenzhen(Grant Nos.20220808165025003,20200812000347001)Chinasupported by the open foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials,State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University(Grant No.2022GXYSOF13)。
文摘Sb_(2)Se_(3) with unique one-dimensional(1D) crystal structure exhibits exceptional deformation tolerance,demonstrating great application potential in flexible devices.However,the power conversion efficiency(PCE) of flexible Sb_(2)Se_(3) photovoltaic devices is temporarily limited by the complicated intrinsic defects and the undesirable contact interfaces.Herein,a high-quality Sb_(2)Se_(3) absorber layer with large crystal grains and benign [hkl] growth orientation can be first prepared on a Mo foil substrate.Then NaF intermediate layer is introduced between Mo and Sb_(2)Se_(3),which can further optimize the growth of Sb_(2)Se_(3)thin film.Moreover,positive Na ion diffusion enables it to dramatically lower barrier height at the back contact interface and passivate harmful defects at both bulk and heterojunction.As a result,the champion substrate structured Mo-foil/Mo/NaF/Sb_(2)Se_(3)/CdS/ITO/Ag flexible thin-film solar cell delivers an obviously higher efficiency of 8.03% and a record open-circuit voltage(V_(OC)) of 0.492 V.This flexible Sb_(2)Se_(3) device also exhibits excellent stability and flexibility to stand large bending radius and multiple bending times,as well as superior weak light photo-response with derived efficiency of 12.60%.This work presents an effective strategy to enhance the flexible Sb_(2)Se_(3) device performance and expand its potential photovoltaic applications.
