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Surface Ligand Management Aided by a Secondary Amine Enables Increased Synthesis Yield of CsPbI(3)Perovskite Quantum Dots and High Photovoltaic Performance
Wang, Y; Yuan, JY; Zhang, XL; Ling, XF; Larson, BW; Zhao, Q; Yang, YG; Shi, Y; Luther, JM; Ma, WL
2020
Source PublicationADVANCED MATERIALS
ISSN0935-9648
Volume32Issue:32Pages:-
Subtype期刊论文
AbstractLead-halide perovskite quantum dots (PQDs) or more broadly, nanocrystals possess advantageous features for solution-processed photovoltaic devices. The nanocrystal surface ligands play a crucial role in the transport of photogenerated carriers and ultimately affect the overall performance of PQD solar cells. Significantly improved CsPbI(3)PQD synthetic yield and solar-cell performance through surface ligand management are demonstrated. The treatment of a secondary amine, di-n-propylamine (DPA), provides a mild and efficient approach to control the surface ligand density of PQDs, which has an apparently different working mechanism compared to previously reported surface treatments. Using an optimal DPA concentration, the treatment can simultaneously remove both long-chain insulating surface ligands of oleic acid and oleylamine, even for unpurified PQDs with high ligand density. As a result, the electrical coupling between PQDs is enhanced, leading to improved charge transport, reduced carrier recombination, and a high power conversion efficiency approaching 15% for CsPbI3-PQD-based solar cells. In addition, the production yield of CsPbI(3)PQDs can be increased by a factor of 8. These results highlight the importance of developing new ligand-management strategies, specifically for emerging PQDs to achieve scalable and high-performance perovskite-based optoelectronic devices.
KeywordSOLAR-CELLS ALPHA-CSPBI3 PEROVSKITE HALIDE PEROVSKITES EFFICIENCY STABILITY NANOCRYSTALS EXCHANGE
DOI10.1002/adma.202000449
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33178
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab CarbonBased Funct Mat & Devices, Joint Int Res Lab Carbon Based Funct Mat & Device, 199 Ren Ai Rd,Suzhou Ind Pk, Suzhou 215123, Peoples R China
2.Natl Renewable Energy Lab, Chem & Nanosci Dept, Golden, CO 80401 USA
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
Recommended Citation
GB/T 7714
Wang, Y,Yuan, JY,Zhang, XL,et al. Surface Ligand Management Aided by a Secondary Amine Enables Increased Synthesis Yield of CsPbI(3)Perovskite Quantum Dots and High Photovoltaic Performance[J]. ADVANCED MATERIALS,2020,32(32):-.
APA Wang, Y.,Yuan, JY.,Zhang, XL.,Ling, XF.,Larson, BW.,...&Ma, WL.(2020).Surface Ligand Management Aided by a Secondary Amine Enables Increased Synthesis Yield of CsPbI(3)Perovskite Quantum Dots and High Photovoltaic Performance.ADVANCED MATERIALS,32(32),-.
MLA Wang, Y,et al."Surface Ligand Management Aided by a Secondary Amine Enables Increased Synthesis Yield of CsPbI(3)Perovskite Quantum Dots and High Photovoltaic Performance".ADVANCED MATERIALS 32.32(2020):-.
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