skip to primary navigationskip to content

Optoelectronics

Cavendish Laboratory, Cambridge

Studying at Cambridge

 

Dr M. Ibrahim Dar

Dr M. Ibrahim Dar

Royal Society University Research Fellow

Optoelectronics Group
Cavendish Laboratory
University of Cambridge
J J Thomson Avenue
Cambridge
CB3 0HE

Email:

Key Publications

(*= corresponding author)

 Perovskite Solar Cells

  1. N. Arora,† M. IBRAHIM DAR,†* A. Hinderhofer, N. Pellet, F. Schreiber, S. M. Zakeeruddin, M.  Grätzel* Perovskite solar cells with CuSCN hole extraction layers yield stabilized efficiencies greater than 20%. Science 2017, 358, 768-771. DOI: 10.1126/science.aam5655 (†= authors contributed equally)
  2. Y. Wang, M. IBRAHIM. DAR,* L.K. Ono, T. Zhang, M. Kan, Y. Li, L. Zhang, X. Wang, Y. Yang, X. Gao, Y. Qi,* M. Grätzel,* Y. Zhao* Thermodynamically stabilized β-CsPbI3 based perovskite solar cells with efficiencies >18%, Science, 2019,  365, 591-595. DOI: 10.1126/science.aav8680  
  3. T. Zhang, M. IBRAHIM. DAR, G. Li, F. Xu, N. Guo, M. Grätzel, Y. Zhao Bication lead iodide 2D perovskite component to stabilize inorganic α-CsPbI3 perovskite phase for high-efficiency solar cells. Science Advances 2017, 3, e1700841. DOI: 10.1126/sciadv.1700841  
  4. M. Abdi-Jalebi,* M. IBRAHIM DAR, S. P. Senanayak, A. Sadhanala, Z. Andaji-Garmaroudi, L. M. Pazos-Outón, J. M. Richter, A. J. Pearson, H. Sirringhaus, M. Grätzel and R. H. Friend.* Charge extraction via graded doping of hole transport layers gives highly luminescent and stable metal halide perovskite devices. Science Advances, 2019, 5, eaav2012. DOI: 10.1126/sciadv.aav2012
  5. N. Arora,† M. IBRAHIM DAR,†* M. Abdi-Jalebi, F. Giordano, N. Pellet, G. Jacopin, R. H. Friend, S. M. Zakeeruddin, M. Grätzel.* Intrinsic and Extrinsic Stability of Formamidinium Lead Bromide Perovskite Solar Cells Yielding High Photovoltage. Nano Letters 2016, 16, 7155–7162. DOI: 10.1021/acs.nanolett.6b03455  (†= authors contributed equally)
  6. M. IBRAHIM DAR,* M. Abdi-Jalebi, N. Arora, T. Moehl, M. Grätzel, and M. K. Nazeeruddin.*  Understanding the impact of bromide on the photovoltaic performance of CH3NH3PbI3 solar cells. Advanced Materials 2015, 27, 7221–7228. DOI:10.1002/adma.201503124

 

Emission Spectroscopy

  1. M. IBRAHIM DAR,* G. Jacopin, S. Meloni, A. Mattoni, N. Arora, A. Boziki, S. M. Zakeeruddin, U. Rothlisberger, M. Graetzel. Origin of unusual bandgap shift and dual emission in organic-inorganic lead halide perovskites. Science Advances 2016, 2, e1601156. DOI: 10.1126/sciadv.1601156
  2. D. Bi, W. Tress, M. IBRAHIM. DAR, P. Gao, J. Luo, C. Renevier, K. Schenk, A. Abate, F. Giordano, J.-P. Correa Baena, J.-D. Decoppet, S. M. Zakeeruddin, M. K. Nazeeruddin, M. Grätzel, A. Hagfeldt. Efficient luminescent solar cells based on tailored mixed-cation perovskites. Science Advances 2016, 2, e1501170. DOI:  10.1126/sciadv.1501170
  3. N. Arora,† M. IBRAHIM DAR,†* M. Hezam, W. Tress, G. Jacopin, T. Moehl, P. Gao, A. S. Aldwayyan, B. Deveaud, M. Grätzel, and M. K. Nazeeruddin. Photovoltaic and Amplified Spontaneous Emission Studies of High-Quality Formamidinium Lead Bromide Perovskite Films. Advanced Functional Materials 2016, 26, 2846–2854. DOI: 10.1002/adfm.201504977  (†= authors contributed equally
  4. M. IBRAHIM DAR,* G. Jacopin, M. Hezam, N. Arora, S. M.Zakeeruddin, B. Deveaud, M. K. Nazeeruddin, M. Graetzel. Asymmetric cathodoluminescence emission in CH3NH3PbI3-xBrx Perovskite Single Crystals. ACS Photonics 2016, 3, 947–952. DOI: 10.1021/acsphotonics.6b00290  

 

X-ray Scattering

  1. Y. Liu, S.Akin, L. Pan, R. Uchida, N. Arora, J. V.  Milic, A. Hinderhofer, F. Schreiber, A. R. Uhl, S. M. Zakeeruddin, A. Hagfeldt, M. IBRAHIM DAR,* M. Grätzel*Ultra-Hydrophobic 3D/2D Fluoroarene Bilayer-Based Water-Resistant Perovskite Solar Cells with Efficiencies Exceeding 22%. Science Advances, 2019, 5, eaaw2543 DOI: 10.1126/sciadv.aaw2543
  2. M. IBRAHIM. DAR*, A. Hinderhofer, G. Jacopin, V. Belova, N. Arora, S. M. Zakeeruddin, F. Schreiber and M. Grätzel. Function Follows Form: Correlation between the Growth and Local Emission of Perovskite Structures and the Performance of Solar Cells. Advanced Functional Materials, 2017, 27, 1701433. DOI: 10.1002/adfm.201701433
  3. A. Greco, A. Hinderhofer,* M. IBRAHIM. DAR,* N. Arora, J. Hagenlocher, A. Chumakov, M. Grätzel and F. Schreiber. Kinetics of Ion-Exchange Reactions in Hybrid Organic–Inorganic Perovskite Thin Films Studied by in Situ Real-Time X-ray Scattering. The Journal of Physical Chemistry Letters, 2018, 9, 6750-6754. DOI: 10.1021/acs.jpclett.8b02916  

 

Electron Microscopy

  1. X. Li, M. IBRAHIM DAR, C. Yi, J. Luo, M. Tschumi, S. M. Zakeeruddin, M. K. Nazeeruddin, H. Han, M. Grätzel* Improved performance and stability of perovskite solar cells by crystal crosslinking with alkylphosphonic acid ω-ammonium chlorides. Nature Chemistry 2015, 7, 703-711. DOI: 10.1038/nchem.2324
  2. M. IBRAHIM DAR,* N. Arora, P. Gao, S. Ahmad, M. Grätzel,* and M. K. Nazeeruddin.* Investigation Regarding the Role of Chloride in Organic-Inorganic Halide Perovskites Obtained from Chloride Containing Precursors. Nano Letters 2014, 14, 6991–6996.  DOI: 10.1021/nl503279x
  3. M. IBRAHIM DAR, F. J. Ramos, Srinivasrao A. Shivashankar, Shahzada Ahmad, Bin Liu, Mohammad Khaja Nazeeruddin,* and Michael Grätzel.* Photoanode based on (001)-oriented anatase nanoplatelets for organic-inorganic lead iodide perovskite solar cell. Chemistry of Materials 2014, 26, 4675–4678. DOI: 10.1021/cm502185s