Fluorine Functionalized MXene QDs for Near-Record- Efficiency CsPbI_3 Solar Cell with High Open-Circuit Voltage

Dongfang Xu; Tong Li; Yu HanXuexia HeShaomin YangYuhang CheJie XuHong ZouXi GuoJungang WangXuruo LeiZhike Liu

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Fluorine Functionalized MXene QDs for Near-Record- Efficiency CsPbI_3 Solar Cell with High Open-Circuit Voltage

机译：Fluorine Functionalized MXene QDs for Near-Record- Efficiency CsPbI_3 Solar Cell with High Open-Circuit Voltage

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CsPbI3 inorganic perovskites have attracted significant attention due to theirdesirable bandgap for tandem solar cells and excellent thermal stability.However, CsPbI3 perovskite solar cells (PSCs) still exhibit low efficiency and highenergy loss due to nonradiative recombination. Herein, functionalized Ti3C2Fxquantum dots (QDs) are prepared and selected as interface passivators toenhance the performance of CsPbI_3 PSCs. The systematic experimental resultsreveal that Ti_3C_2Fx QDs serve as effective passivators mainly in three aspects:1) p-type Ti_3C_2Fx QDs can tune the energy level of perovskite films and providean efficient pathway for hole transfer; 2) Ti_3C_2Fx QDs can effectively passivatedefects and reduce interfacial nonradiative recombination, and 3) Ti_3C_2Fx QDsform a barrier layer to prevent water invasion and improve the stability of CsPbI3PSCs. Consequently, the champion CsPbI_3 PSC with Ti_3C_2Fx QDs treatmentexhibits an excellent efficiency of 20.44% with a high open-circuit voltage of1.22 V. Meanwhile, the corresponding device without encapsulation retained93% of its initial efficiency after 600 h of storage in ambient air.

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来源
《Advanced functional materials》 |2022年第33期|2203704.1-2203704.9|共9页
作者
Dongfang Xu; Tong Li; Yu HanXuexia HeShaomin YangYuhang CheJie XuHong ZouXi GuoJungang WangXuruo LeiZhike Liu;
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作者单位

Key Laboratory of Applied Surface and Colloid ChemistryMinistry of Education,Shaanxi Key Laboratory for Advanced EnergyDevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 7;

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正文语种英语
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high efficiency; high voltages; inorganic perovskites; Mxenes; Ti_3C_2F_x QDs;

Fluorine Functionalized MXene QDs for Near-Record- Efficiency CsPbI_3 Solar Cell with High Open-Circuit Voltage

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