Spacer Cation Engineering Enables Blue Quasi‐2D Perovskites to Achieve Highly Efficient and Spectrally Stable Electroluminescence Article Swipe
Bufan Yu
,
Zhaohui Xing
,
Dengliang Zhang
,
Xingxing Duan
,
Qingguo Du
,
Ziqing Ye
,
Wei Hong
,
Yue Liang
,
Peiyuan Pang
,
Dezhi Yang
,
Lei Wang
,
Guichuan Xing
,
Jiangshan Chen
,
Dongge Ma
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/smll.202501333
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/smll.202501333
The combination of organic spacer cations and mixed‐halides to produce multiphase quasi‐2D perovskites is a promising strategy for fabricating blue perovskite light‐emitting diodes (PeLEDs). However, insufficient energy transfer, trap‐assisted recombination and exciton‐phonon coupling lead to significant non‐radiative losses. Here, a co‐spacer engineering strategy of binding guanidinium (GA + ) and ortho ‐fluorophenylethylamium (oF‐PEA + ) through hydrogen bonds is proposed to prepare blue mixed‐halide quasi‐2D perovskite films with high photoluminescence quantum yields (PLQYs). GA + with Lewis base characteristics reduces the trap states by defect passivation. Additionally, oF‐PEA + inhibits the rapid diffusion of GA + by hydrogen bonding interactions, which mitigates the formation of undesirable low‐dimensional phases and facilitates the growth of high‐dimensional emissive phases with a more concentrated distribution, resulting in efficient energy transfer of excitons and weaker exciton‐phonon coupling. These synergistic effects enable the blue perovskite films to achieve a PLQY as high as 91.5%. As a result, the fabricated blue PeLEDs show a remarkable external quantum efficiency of 21.1% at the stable emissionpeak of 489 nm with a narrow full width at half‐maximum of 19 nm.
Related Topics
Concepts
Photoluminescence
Materials science
Perovskite (structure)
Exciton
Electroluminescence
Passivation
Band gap
Optoelectronics
Quantum efficiency
Halide
Chemical physics
Blueshift
Photochemistry
Nanotechnology
Crystallography
Chemistry
Inorganic chemistry
Condensed matter physics
Layer (electronics)
Physics
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/smll.202501333
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/smll.202501333
- OA Status
- bronze
- Cited By
- 4
- References
- 60
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4408550132
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4408550132Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1002/smll.202501333Digital Object Identifier
- Title
-
Spacer Cation Engineering Enables Blue Quasi‐2D Perovskites to Achieve Highly Efficient and Spectrally Stable ElectroluminescenceWork title
- Type
-
articleOpenAlex work type
- Language
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enPrimary language
- Publication year
-
2025Year of publication
- Publication date
-
2025-03-18Full publication date if available
- Authors
-
Bufan Yu, Zhaohui Xing, Dengliang Zhang, Xingxing Duan, Qingguo Du, Ziqing Ye, Wei Hong, Yue Liang, Peiyuan Pang, Dezhi Yang, Lei Wang, Guichuan Xing, Jiangshan Chen, Dongge MaList of authors in order
- Landing page
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https://doi.org/10.1002/smll.202501333Publisher landing page
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-
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/smll.202501333Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
bronzeOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/smll.202501333Direct OA link when available
- Concepts
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Photoluminescence, Materials science, Perovskite (structure), Exciton, Electroluminescence, Passivation, Band gap, Optoelectronics, Quantum efficiency, Halide, Chemical physics, Blueshift, Photochemistry, Nanotechnology, Crystallography, Chemistry, Inorganic chemistry, Condensed matter physics, Layer (electronics), PhysicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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4Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 4Per-year citation counts (last 5 years)
- References (count)
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60Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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| referenced_works | https://openalex.org/W4324344487, https://openalex.org/W6600547436, https://openalex.org/W3215312601, https://openalex.org/W6611451672, https://openalex.org/W3005092799, https://openalex.org/W4311673968, https://openalex.org/W4284689583, https://openalex.org/W4378640415, https://openalex.org/W3200371717, https://openalex.org/W4210760349, https://openalex.org/W4285900290, https://openalex.org/W4308620767, https://openalex.org/W6600020421, https://openalex.org/W3061209496, https://openalex.org/W3070507757, https://openalex.org/W4310732283, https://openalex.org/W6605031968, https://openalex.org/W4213336081, https://openalex.org/W6601160530, https://openalex.org/W4289869457, https://openalex.org/W3176854882, https://openalex.org/W4324307127, https://openalex.org/W2995822675, https://openalex.org/W4327733948, https://openalex.org/W4309277465, https://openalex.org/W2979651828, https://openalex.org/W2611277466, https://openalex.org/W3131699578, https://openalex.org/W2906997400, https://openalex.org/W6847039535, https://openalex.org/W2890407556, https://openalex.org/W2891879216, https://openalex.org/W4200350100, https://openalex.org/W6605546967, https://openalex.org/W3209972371, https://openalex.org/W4211007878, https://openalex.org/W3158866229, https://openalex.org/W3006971234, https://openalex.org/W3195138010, https://openalex.org/W3046128640, https://openalex.org/W3086817672, https://openalex.org/W2794306991, https://openalex.org/W1987387870, https://openalex.org/W2021070664, https://openalex.org/W2998126305, https://openalex.org/W3110799727, https://openalex.org/W4308314954, https://openalex.org/W4292448850, https://openalex.org/W3212108291, https://openalex.org/W2332549384, https://openalex.org/W2924619706, https://openalex.org/W3026456341, https://openalex.org/W2132525235, https://openalex.org/W2029667189, https://openalex.org/W2592943572, https://openalex.org/W2121817924, https://openalex.org/W2083222334, https://openalex.org/W1981368803, https://openalex.org/W2030976617, https://openalex.org/W2086957099 |
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| corresponding_author_ids | https://openalex.org/A5082513420, https://openalex.org/A5112890155, https://openalex.org/A5087951236, https://openalex.org/A5101934943 |
| countries_distinct_count | 2 |
| institutions_distinct_count | 14 |
| corresponding_institution_ids | https://openalex.org/I204512498, https://openalex.org/I4210138186, https://openalex.org/I4391767939, https://openalex.org/I47720641, https://openalex.org/I90610280 |
| sustainable_development_goals[0].id | https://metadata.un.org/sdg/7 |
| sustainable_development_goals[0].score | 0.8899999856948853 |
| sustainable_development_goals[0].display_name | Affordable and clean energy |
| citation_normalized_percentile.value | 0.95066027 |
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| citation_normalized_percentile.is_in_top_10_percent | True |