Halogen Substitution in Zero-Dimensional Mixed Metal Halides toward Photoluminescence Modulation and Enhanced Quantum Yield | Научно-инновационный портал СФУ

Halogen Substitution in Zero-Dimensional Mixed Metal Halides toward Photoluminescence Modulation and Enhanced Quantum Yield

Тип публикации: статья из журнала

Ключевые слова: halogen substitution; hybrid metal halides; photoluminescene quantum yield , WHITE-LIGHT EMISSION; PEROVSKITES; EXCITONS

Аннотация: Zero-dimensional (0D) organic-inorganic hybrid metal halides haveunprecedented degrees of freedom for structural tunability and photoluminescence modulation. Here, the 0D isomorphic hybrid metal mixed halides (C9NH20)(9)Pb3Zn2Br19(1-x)Cl19x (x = 0-1) with continuous halogen contents control, exhibiting tunable emission and enhancement of photoluminescence quantum yield (PLQY) are reported. The competitive bromine to chlorine substitution process in (C9NH20)(9)Pb3Zn2Br19(1-x)Cl19x occurs first in [ZnBr4-xClx](2-) tetrahedron before the [Pb3Br11-xClx](5-) trimer. The increasing Cl content in samples from x = 0 to 1 results in an expected blue shift of emission peak from 565 to 516 nm, and meanwhile a strikingly room temperature PL quantum yield increase from 8% to 91%. Combined experimental characterizations and theoretical calculations indicate that the blue shift of interband transition energy is responsible for the emission peak shift. Moreover, with the increasing Cl content, the enhanced electron-phonon interaction and the weakened thermal-assisted nonradiative recombination result in more efficient radiative transition channels and ultimately enhanced PLQY. The impact of halogen substitution on electronic structures and optical properties in 0D hybrid metal halides is emphasized in this work as a new strategy to promote the future development of new luminescent materials.

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Издание

Журнал: Advanced optical materials

Номера страниц: 2000418

ISSN журнала: 21951071

Место издания: WEINHEIM

Издатель: WILEY-V C H VERLAG GMBH

Авторы

  • Li Mingze (Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China)
  • Li Yawen (Jilin Univ, Coll Mat Sci & Engn, Key Lab Automobile Mat MOE, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China)
  • Molokeev Maxim S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia)
  • Zhao Jing (Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China)
  • Na Guangren (Jilin Univ, Coll Mat Sci & Engn, Key Lab Automobile Mat MOE, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China)
  • Zhang Lijun (Jilin Univ, Coll Mat Sci & Engn, Key Lab Automobile Mat MOE, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China)
  • Xia Zhiguo (Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China; South China Univ Technol, Inst Opt Commun Mat, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Guangdong, Peoples R China)

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