Academic Journal
L 2 [GA x FA 1– x PbI 3 ]PbI 4 (0 ≤ x ≤ 1) Ruddlesden–Popper Perovskite Nanocrystals for Solar Cells and Light-Emitting Diodes
| العنوان: | L 2 [GA x FA 1– x PbI 3 ]PbI 4 (0 ≤ x ≤ 1) Ruddlesden–Popper Perovskite Nanocrystals for Solar Cells and Light-Emitting Diodes |
|---|---|
| المؤلفون: | C. Meric Guvenc (8676228), Ilknur Tunc (8191815), Sinan Balci (1568329) |
| سنة النشر: | 2021 |
| المجموعة: | Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: | Medicine, Neuroscience, Ecology, Sociology, Cancer, Biological Sciences not elsewhere classified, demonstrate colloidal synthesis, bromide ion exchange, previously reported plqy, colloidally synthesized guanidinium, 5 , 4 , fa alloyed l, fa )- l, high plqy demonstrated, ga )- l, x <, rationalize high, plqy ), sub ><, >, ≤ 1, stable dispersion, solar cells, site cation, significantly higher, rapidly engineered, phase stability, phase instability, optical properties |
| الوصف: | The main challenges to overcome for colloidal 2D Ruddlesden–Popper (RP) organo-lead iodide perovskite nanocrystals (NCs) are phase instability and low photoluminescence quantum yield (PLQY). Herein, we demonstrate colloidal synthesis of guanidinium (GA)-L 2 [GAPbI 3 ]PbI 4 , formamidinium (FA)-L 2 [FAPbI 3 ]PbI 4 , and GA and FA alloyed L 2 [GA 0.5 FA 0.5 PbI 3 ]PbI 4 NCs without using polar or high boiling point nonpolar solvents. Importantly, we show that optical properties and phase stability of L 2 [APbI 3 ]PbI 4 NCs can be affectively tuned by alloying with guanidinium and formamidinium cations. Additionally, the band gap of NCs can be rapidly engineered by bromide ion exchange in L 2 [GA x FA 1– x PbI 3 ]PbI 4 (0 ≤ x ≤ 1) NCs. Our approach produces a stable dispersion of L 2 [FAPbI 3 ]PbI 4 NCs with 12.6% PLQY that is at least three times higher than the previously reported PLQY in the nanocrystals. Furthermore, L 2 [GAPbI 3 ]PbI 4 and L 2 [GA 0.5 FA 0.5 PbI 3 ]PbI 4 NC films exhibit improved ambient stability over 10 days, which is significantly higher than L 2 [FAPbI 3 ]PbI 4 NC films, which transform to an undesired 1D phase within 6 days. The colloidally synthesized guanidinium- and formamidinium-based 2D RP organo-lead iodide perovskite NCs with improved stability and high PLQY demonstrated in this study may find applications in solar cells and light-emitting diodes. Therefore, large A-site cation-alloyed 2D RP perovskite NCs may provide a new way to rationalize high-performance and stable perovskite solar cells and light-emitting diodes. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | https://figshare.com/articles/journal_contribution/L_sub_2_sub_GA_sub_i_x_i_sub_FA_sub_1_i_x_i_sub_PbI_sub_3_sub_PbI_sub_4_sub_0_i_x_i_1_Ruddlesden_Popper_Perovskite_Nanocrystals_for_Solar_Cells_and_Light-Emitting_Diodes/17707385 |
| DOI: | 10.1021/acsanm.1c03727.s001 |
| الاتاحة: | https://doi.org/10.1021/acsanm.1c03727.s001 |
| Rights: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.53907417 |
| قاعدة البيانات: | BASE |
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