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Gadolinium-incorporated CsPbI_(2)Br for boosting efficiency and long-term stability of all-inorganic perovskite solar cells

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Journal of Energy Chemistry 2022年第7期31卷 9-17,I0001页

作者： Xingyu Pu Jiabao Yang Tong Wang Shuaici Cheng Qi Cao Junsong Zhao Hui Chen Yixin Zhang Tingting Xu Ilhom Tojiboyev Hadi Salari Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXian710072.ShaanxiChina Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an 710129ShaanxiChina School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129ShaanxiChina Institute Ion-Plasma and Laser Technologies Uzbekistan Academy of Sciences100125Durmon yuli 33TashkentUzbekistan Faculty of Physical Chemistry Shiraz UniversityShiraz 71345Iran

all-inorganic CsPbI_(2)Br perovskite solar cells(PSCs)have received extensive research interests recently.Nevertheless,their low efficiency and poor long-term stability are still obstacles for further commercial application.Herein,we demonstrate that high efficiency and exceptional long-term stability are realized by incorporating gadolinium(III)chloride(GdCl_(3))into the CsPbI_(2)Br perovskite film.The incorporation of GdCl_(3) enhances the Goldschmidt tolerance factor of CsPbI_(2)Br perovskite,yielding a dense perovskite film with small grains,thus the a-phase CsPbI_(2)Br is remarkably stabilized.Additionally,it is found that the GdCl_(3)-incorporated perovskite film achieves suppressed charge recombination and appropriate energy level alignment compared with the pristine CsPbI_(2)Br film.The noticeable increment in efficiency from14.01%(control PSC)to 16.24%is achieved for GdCl_(3)-incorporated PSC.Moreover,the nonencapsulated GdCl_(3)-incorporated PSC exhibits excellent environmental and thermal stability,remaining over 91%or90%of the original efficiency after 1200 h aging at 40%relative humidity or 480 h heating at 85℃ in nitrogen glove box respectively.The encapsulated GdCl_(3)-incorporated PSC presents an improved operational stability with over 88%of initial efficiency under maximum power point(MPP)tracking at 45℃ for1000 h.This work presents an effective ion-incorporation approach for boosting efficiency and long-term stability of all-inorganic PSCs.

关键词： all-inorganic perovskite CsPbI_(2)Br Gadolinium incorporation Power conversion efficiency Long-term stability

Stable α-CsPbI3 with extremely red emission for expanding the color gamut

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Science China(Information Sciences) 2024年第5期67卷 311-317页

作者： Yong ZHANG Xin WEI Lei GAO Weijie ZHAO Changjiu SUN Junli WEI Mingjian YUAN Zhenhua NI Junpeng LU Hongwei LIU School of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center (RECAST) College of Chemistry Nankai University Jiangsu Key Lab on Opto-Electronic Technology School of Physics and TechnologyNanjing Normal University

The wider color gamut represents the better reproducibility of the real natural colors. perovskite materials exhibit promising potential in full-color wide-gamut displays because of the wide tunability and high saturability of their photon emission. However, the full-color wide gamut(>100% Rec.2020) has not been constructed due to the lack of the extreme red primary color(～700 nm). Herein, the widest color gamut is realized, whereinα-CsPbI3 is used to generate the extreme red primary color. An in-situ encapsulation approach is advised to stabilizeα-CsPbI3 at room temperature by means of polyvinylpyrrolidone(PVP).Theα-CsPbI3 encapsulated by PVP(denoted as P-CPI) shows highly saturated(FWHM(full width at half maximum) ～28 nm) and extremely(～697 nm) red emission. The green emission is provided by P-CPBr(CsPbBr3 with PVP) which is also synthesized using the universal in-situ encapsulation approach. With the assistance of a commercial Ga N chip, the RGB gamut is extended to the widest(151% NTSC, 113%Rec.2020).

关键词： all-inorganic perovskite wide color gamut LED display carrier recombination

Improving the stability and scalability of all-inorganic inverted CsPbI_(2)Br perovskite solar cell

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Journal of Energy Chemistry 2022年第5期31卷 176-183页

作者： Chenghao Duan Qiaoyun Wen Yan Fan Jiong Li Zidan Liu Keyou Yan School of Environment and Energy State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Solid Wastes Pollution Control and RecyclingSouth China University of TechnologyGuangzhou 510000GuangdongChina Medical Devices Research&Testing Center South China University of TechnologyGuangzhou 510000GuangdongChina

all-inorganic perovskite solar cells(PSCs) have potential to pass the stability international standard of IEC61215:2016 but cannot deliver high performance and stability due to the poor interface contact. In this paper, Sn-doped TiO_(2)(Ti_(1-x)Sn_(x)O_(2)) ultrathin nanoparticles are prepared for electron transport layer(ETL) by solution process. The ultrathin Ti_(1-x)Sn_(x)O_(2) nanocrystals have greatly improved interface contact due to the facile film formation, good conductivity and high work function. The all-inorganic inverted NiOx/CsPbI_(2)Br/Ti_(1-x)Sn_(x)O_(2)p-i-n device shows a power conversion efficiency(PCE) of 14.0%. We tested the heat stability, light stability and light-heat stability. After stored in 85℃ for 65 days, the inverted PSCs still retains 98% of initial efficiency. Under continuous standard one-sun illumination for 600 h,there is no efficiency decay, and under continuous illumination at 85℃ for 200 h, the device still retains 85% of initial efficiency. The 1.0 cm^(2) device of inverted structure shows a PCE of up to 11.2%. The ultrathin Ti_(1-x)Sn_(x)O_(2)is promising to improve the scalability and stability and thus increase the commercial prospect.

关键词： all-inorganic perovskite Sn-doped TiO_(2) Ultrathin nanocrystal Stability Scalability

Doping Electron Transporting Layer:An Effective Method to Enhance J_(SC)of all-inorganic perovskite Solar Cells

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Energy & Environmental Materials 2021年第4期4卷 500-501页

作者： Chao Liang Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacaoChina

all-inorganic metal-halide CsPbBr_(3)perovskite has emerged as an attractive photovoltaic material for its outstanding environmental stability.However,due to the wide bandgap,the performance of CsPbBr_(3)perovskite solar cells(PSCs)is limited,especially for the short-circuit current density(J_(SC)).In this issue of Energy&Environmental Materials,Guo et al.employed Nb-doped SnO_(2)as electron transporting layers(ETLs),which could greatly improve the J_(SC)of the PSCs based on all-inorganic CsPbBr_(3).

关键词： all-inorganic perovskite depletion region width doping planar heterojunction

all-inorganic dual-phase halide perovskite nanorings

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Nano Research 2020年第11期13卷 2994-3000页

作者： Yapeng Zheng Tao Yang Zhi Fang Minghui Shang Zuotai Zhang Jack Yang Jiaxin Fan Weiyou Yang Xinmei Hou Tom Wu Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China Institute of Materials Ningbo University of TechnologyNingbo315211China School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSouthern University of Science and TechnologyShenzhen518055China School of Material Science and Engineering University of New South WalesSydneyNSW2052Australia Australian Nuclear Science and Technology Organization New Illawarra RoadSydneyNSW2234Australia

In the present work,we report the growth of all-inorganic perovskite nanorings with dual compositional phases of CsPbBr_(3)and CsPb_(2)Br5 via a facile hot injection process.The self-coiling of CsPbBr_(3)-CsPb_(2)Br5 nanorings is driven by the axial stress generated on the outside surface of the as-synthesized nanobelts,which results from the lattice mismatch during the transformation of CsPbBr_(3)to CsPb_(2)Br5.The tailored growth of nanorings could be achieved by adjusting the key experimental parameters such as reaction temperature,reaction time and stirring speed during the cooling process.The photoluminescence intensity and quantum yield of nanorings are higher than those of CsPbBr_(3)nanobelts,accompanied by a narrower full width at half maximum(FWHM),suggesting their high potential for constructing self-assembled optoelectronic nanodevices.

关键词： all-inorganic perovskite CsPbBr_(3) CsPb_(2)Pb_(5) dual-phase nanorings

X-ray imager of 26-μm resolution achieved by perovskite assembly

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Nano Research 2022年第3期15卷 2399-2404页

作者： Zhaofen Wang Ruijia Sun Nianqiao Liu Huailin Fan Xun Hu Depeng Shen Yuhai Zhang Hong Liu State Key Laboratory of Crystal Material Shandong UniversityJinan 250100China Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinan 250022China School of Physics and Technology University of JinanJinan 250022China School of Material Science and Engineering University of JinanJinan 250022China

Spatial resolution is an important criterion to evaluate the performance of a scintillation screen for X-ray imaging.perovskite-based X-ray screen,usually made of powders or polycrystalline films,suffers from low spatial resolution(~200μm)due to the large thickness of scintillation layer despite of their compelling sensitivity to X-ray dose.In this work,a concentrated colloid of CsPbBr_(3)nanosheets was synthesized via a co-precipitation method at ambient condition.By drop casting,smooth scintillation screens of varied thickness were formed through self-assembly,which exhibited both high internal and external photoluminescence quantum yield(PL QY)(84.5%and 75.1%,respectively).The screen-based X-ray detector showed a high sensitivity down to 27 nGy/s,two orders of magnitude lower than the regular dose for medical diagnostics.Importantly,the screen of optimal thickness of 15μm showcased an unprecedented spatial resolution(26μm)when used for X-ray radiography,representing one order of magnitude improvement in perovskite community.

关键词： perovskite scintillator high-resolution X-ray imaging self-assembly perovskite nanosheets all-inorganic perovskite

A silazane additive for CsPbI_(2)Br perovskite solar cells

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Chinese Physics B 2022年第11期31卷 54-59页

作者：曹瑞琪乐耀昌张弘程倩王博欣李世麟张渊李书宏周惠琼 Beijing Technology&Business University Department of ChemistryBeijing 100048China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China HEEGER Beijing Research&Development Center Beihang UniversityBeijing 100190China

Adding additives into peroskite precursor solution has been proven as a simple and efficient strategy to improve the quality of peroskite films.In this work,we demonstrate an effective additive strategy to improve the quality of all-inorganic perovskite films by adding a novel silazane additive heptamethyldisilazane(HDMS).The power conversion efficiency(PCE)of the optimized devices is enhanced from 14.55%to 15.31%with an open-circuit voltage over 1.26 V due to the higher quality perovskite films with lower trap density after the incorporation of HDMS.More interestingly,the HDMS devices exhibit superior humidity and thermal stability compared with the control ones.This work provides a simple and efficient strategy to enhance the device performance and stability of all-inorganic perovskite solar cells,which could facilitate its commercialization.

关键词： silazane all-inorganic perovskite heptamethyldisilazane(HDMS) additive solar cells

Efficient and stable carbon-based mixed Pb-Sn all-inorganic perovskite solar cells

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Efficient and stable carbon-based mixed Pb-Sn all-inorganic ...

Reducing defect of inorganic perovskite film by sulphur-containing Lewis base for robust photodetectors

第八届新型太阳能材料科学与技术学术研讨会

作者： Bingjie Xu Chen Dong Rong Liu Gentian Yue Yueyue Gao Furui Tan Key Laboratory of Photovoltaic Materials Henan University

Cs-based all-inorganic perovskites have been receiving unprecedented attentions in photovoltaic applications due to their high thermodynamic stability [1-2]. However, unfavorable bandgap and phase instability of Cs-based inorganic perovskites still hinder their further developments [3]. In this work, mixed Pb-Sn inorganic perovskites were prepared by a facile solution process. It was found that the incorporation of Sn in Cs-based inorganic perovskites could not only narrow the bandgap from 2.06 eV to 1.63 eV, but also stabilize the perovskite phase structure by increasing their tolerance factor. By further introducing the antioxidant SnF to slow down the oxidation of Sn, and replacing labile organic hole-transporting-layer and noble metal-electrode with a carbon-electrode, the resultant carbon-based Pb-Sn mixed all-inorganic perovskite solar cells(C-IPSCs) achieved a champion efficiency up to 12.69 % and a high open-circuit voltage of 1.23 V.

关键词： CsPb1-xSnxIBr2 carbon-electrode all-inorganic perovskite bandgap tailoring

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Journal of Energy Chemistry 2021年第10期30卷 163-169,I0005页

作者： Jian Du Jialong Duan Xiya Yang Qingwei Zhou Yanyan Duan Tingting Zhang Qunwei Tang Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632GuangdongChina State Centre for International Cooperation on Designer Low-Carbon and Environmental Material(SCICDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina Guangdong Provincial Key Laboratory of Development and Education for Special Needs Children Lingnan Normal UniversityZhanjiang 524048GuangdongChina

Sluggish charge transfer in perovskite film induced by inherent defects such as uncoordinated Pb2+undoubtedly hinders the rapid response of self-powered photovoltaic-typed detector.Based on interaction between Lewis acids and bases,herein,we employ thiourea molecule as a multifunctional Lewis base to significantly improve the quality of all-inorganic CsPbIBr2 perovskite film.After careful characterizations,the quality of perovskite film has been well regulated.Arising from the reduced defect and the reinforced the interfacial charge extraction owing to the strong interaction between uncoordinated Pb2+ions and the-C=S groups in thiourea and the formation of hydrogen bond at perovskite/TiO_(2) interface,an enhanced responsivity of 0.335 A W-1 and specific detectivity of 3.92×10^(12) Jones has been achieved for the self-powered,carbon-electrode based photodetector,which is comparable to the state-of-theart device based on CsPbIBr2 film.More importantly,the device free of encapsulation remains 82.8%of initial performance after storage over 56 days in ambient atmosphere,promoting the practical deployment of perovskite products.

关键词： all-inorganic perovskite Self-powered photodetector Defect passivation Charge transfer Stability