24.11 High Performance Perovskite Solar Cells by Dual Interfacial Carrier Mobility Enhancement and Charge-Carrier Transport Balance

Yuhong Zhang; Lin Xu; Jiao SunYanjie WuZitong KanHuan ZhangLong YangBin LiuBiao DongXue BaiHongwei Song

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24.11 High Performance Perovskite Solar Cells by Dual Interfacial Carrier Mobility Enhancement and Charge-Carrier Transport Balance

机译：24.11 High Performance Perovskite Solar Cells by Dual Interfacial Carrier Mobility Enhancement and Charge-Carrier Transport Balance

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The open-circuit voltage (V_(OC)) and fill factor (FF) of perovskite solar cells (PSCs)are detrimentally weakened by carrier loss at the perovskite/charge transportlayers (CTLs) interfaces. Herein, a dual interfacial modification strategy viaplacing Nb_2CT_x nanosheets with tailored optoelectrical properties inducedby manipulating surface terminal groups at both perovskite/CTLs interfacesis employed. Such tactics not only concurrently implement carrier mobilityenhancement of CTLs and interface energy-levels offsets reduction. Moreimportantly, electrical simulation indicates that the Nb_2CT_x with O terminalgroups located at grain boundaries of the perovskite layer, can more efficientlyconduct hole current to the hole transport layer, therefore achieving chargecarriertransport balance in device. As a result, the synergy effect effectivelyelevates both the V_(OC) and FF of the cells, reaching maximum values of 1.253 Vand 81.07%, respectively, finally delivering progressively increased device powerconversion efficiency (PCE) of 24.11% with negligible hysteresis. This PCE valueranks in the highest values to date for PSCs employing Mxenes materials.Moreover, the optimized devices show better thermal and light stability thancontrol devices. This work demonstrates a simple and effective dual interfacialmodification method utilizing Nb_2CT_x for photovoltaic field, involving photodetectors,light-emitting diodes, sensors, etc.

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来源
《Advanced energy materials》 |2022年第37期|2201269.1-2201269.14|共14页
作者
Yuhong Zhang; Lin Xu; Jiao SunYanjie WuZitong KanHuan ZhangLong YangBin LiuBiao DongXue BaiHongwei Song;
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作者单位

State Key Laboratory on Integrated OptoelectronicsCollege of Electronic Science and EngineeringJilin University2699 Qianjin Street, Changchun 130012, P. R. China;

Department of Cell BiologyCollege of Basic Medical SciencesJilin UniversityChangchun, Jilin 130021, P. R. China;

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正文语种英语
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charge-carrier transport balance; dual interfacial; MXene; Nb_2CT_x; perovskite solar cells;

24.11 High Performance Perovskite Solar Cells by Dual Interfacial Carrier Mobility Enhancement and Charge-Carrier Transport Balance

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