Appointment: Research Fellow (Former)

Research topics:

• Perovskite photovoltaics

• LED

• Memories

• Nanomaterials

This dataverse is for the project "Cation influence on carrier dynamics in perovskite solar cells".

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1 to 10 of 23 Results
Replication Data for: Heavy Water Additive in Formamidinium: A Novel Approach to Enhance Perovskite Solar Cell Efficiency
May 1, 2020
Ankur, Solanki; Mohammad Mahdi Tavakoli; Qiang Xu; Sai S.H. Dintakurti; Swee Sien Lim; Anirban Bagui; John V. Hanna; Jing Kong; Sum, Tze Chien, 2020, "Replication Data for: Heavy Water Additive in Formamidinium: A Novel Approach to Enhance Perovskite Solar Cell Efficiency", https://doi.org/10.21979/N9/31GZP9, DR-NTU (Data), V1
Heavy water or deuterium oxide (D2O) comprises of deuterium, a hydrogen isotope twice the mass of hydrogen. Contrary to the disadvantages of deuterated perovskites, such as shorter recombination lifetimes and lower/invariant efficiencies, we herein divulge the serendipitous effec...
Fig 1.rar
May 1, 2020 - Replication Data for: Heavy Water Additive in Formamidinium: A Novel Approach to Enhance Perovskite Solar Cell Efficiency
RAR Archive - 33.4 KB - MD5: 60c7e0f4420af8ee84460bcfff771590
Data
(b) J-V curves of the PSCs without (reference) and with 1 vol% H2O or 1 vol% D2O. Inset graph shows the MPP of the corresponding PSCs for the J-V curves of other devices). (c) EQE spectra of the champion devices. (d) Statistical spread of the PCEs for the reference and devices wi...
Fig 2.rar
May 1, 2020 - Replication Data for: Heavy Water Additive in Formamidinium: A Novel Approach to Enhance Perovskite Solar Cell Efficiency
RAR Archive - 2.9 MB - MD5: 11c643ff5773a4a17f66b6b701f2d1b7
Data
Photoluminescence properties of films prepared with added 0% (reference), 1%, 4% D2O and 1% H2O by vol. in perovskite solution. The symbols denote the experimental data while the solid lines are model fits. (a) PL lifetimes of perovskite samples: control (0%; red square), 1 vol%...
Fig 3.rar
May 1, 2020 - Replication Data for: Heavy Water Additive in Formamidinium: A Novel Approach to Enhance Perovskite Solar Cell Efficiency
RAR Archive - 46.4 MB - MD5: 15f7a9029522439eb55106105da9e6d7
Data
(a) Fourier Transform Infrared (FTIR) spectra of perovskite prepared with 0% (reference), 1% D2O added solutions. The appearance of a new vibrational band between 2337 cm-1 to 2360 cm-1, shows the presence of deuterium. Measured multinuclear MAS NMR data showing, (b) 2H MAS NMR s...
Fig 4.rar
May 1, 2020 - Replication Data for: Heavy Water Additive in Formamidinium: A Novel Approach to Enhance Perovskite Solar Cell Efficiency
RAR Archive - 8.5 MB - MD5: 5a92324a26d0f355a0f0bbe2f68fe555
Data
Calculated phonon dispersion curves of cubic CH(NH2)2PbI3 and CH(ND2)2PbI3PbI3, where D is the deuterium atom. (a) and (b) represents the phonon dispersion without considering Van der Waals forces in calculations while (c) and (d) represents the phonon with Van der Waals forces i...
SI.rar
May 1, 2020 - Replication Data for: Heavy Water Additive in Formamidinium: A Novel Approach to Enhance Perovskite Solar Cell Efficiency
RAR Archive - 29.2 MB - MD5: abdfda4c62f361c30f06b4ee0f0c8d86
Data
Supporting
Replication Data for: Role of Water in Suppressing Recombination Pathways in CH3NH3PbI3 Perovskite Solar Cells
Apr 17, 2020
Ankur, Solanki; Lim Swee Sien; Subodh Mhaisalkar; Sum, Tze Chien, 2020, "Replication Data for: Role of Water in Suppressing Recombination Pathways in CH3NH3PbI3 Perovskite Solar Cells", https://doi.org/10.21979/N9/WUEMZC, DR-NTU (Data), V1
Moisture degradation of halide perovskites is the Achilles heel of perovskite solar cells. A surprising revelation in 2014 about the beneficial effects of controlled humidity in enhancing device efficiencies overthrew established paradigms on perovskite solar cell fabrication. De...
Figure 1.rar
Apr 17, 2020 - Replication Data for: Role of Water in Suppressing Recombination Pathways in CH3NH3PbI3 Perovskite Solar Cells
RAR Archive - 3.5 MB - MD5: 94ab63477d845ea8966460e35ddbc97e
Data
Cross-sectional SEM images of perovskite films with (a) 0, (b) 1 % H2O additive concentration coated on the PEDOT:PSS/ITO/glass substrate. (c,d) Corresponding morphology images across a 2 μm × 2 μm scanned area by AFM, where the RMS roughness is measured to be 4.9 and 4.4 nm fo...
Figure 2.rar
Apr 17, 2020 - Replication Data for: Role of Water in Suppressing Recombination Pathways in CH3NH3PbI3 Perovskite Solar Cells
RAR Archive - 49.4 MB - MD5: 4d861972704683519cc5b9b9490ca4c5
Data
Characterization results from ultrafast optical spectroscopy detailing the recombination dynamics in the perovskite samples. (a) Calculation of trap density by plotting the measured integrated PL intensity against the photoexcited carrier density. (b) TRPL kinetic traces of the...
Figure 3.rar
Apr 17, 2020 - Replication Data for: Role of Water in Suppressing Recombination Pathways in CH3NH3PbI3 Perovskite Solar Cells
RAR Archive - 22.5 MB - MD5: 351dc06034ac89f7d7ed2a29cd5e286f
Data
. (a) Electron (square) and hole (cross) diffusion lengths of the various samples with the respective quencher measured at a fluence of 0.5 μJ cm−2 and calculated with a 1D diffusion model (Figure S7 shows the fitting of TRPL data for different perovskite films). PC61BM is used a...
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