Personal Details

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Dr. OOI Zi-En

Scientist III


Advanced Characterisation and Instrumentation (ACI) Department

6416 8972

2 Fusionopolis Way. Innovis, #08-03, Singapore 138634

Research Details

 1.  Solar cells and photovoltaics
 2.  Light-emitting transistors
 3.  Oxide semiconductors
 4.  Electrochromic materials and devices
 5.  2D semiconductors
 6.  Qubits
 1.  Organic electronic device fabrication
 2.  Electrical measurements
 3.  Numerical simulation
 4.  Instrument automation, data acquisition and Labview programming
 5.  Optical instrumentation
 6.  Low temperature measurements

 2018 - present : Quantitative Phase Imaging

 2017 - 2018 : Spin-Valley Qubits

 2016 - present : Valleytronics

 2015 - 2016 : Mobile Hyperspectral Imaging System

 2014 - 2015 : Printed pH sensor

 2011 - 2014 : Printing technology, process, materials system, and module fabrication development

 2010 - 2012 : Printing process development and device fabrication for printable PV
                      and printed electronics technology

 2009 - 2013 : Organic/Polymer Electronics : Novel Materials & Device Structures for Application
                       in OPV, OFET & OLEFET

 2018 - present :  Scientist III, IMRE, Singapore

 2015 - 2018 : Scientist II, IMRE, Singapore

 2012 - 2016 : Deputy Head, Synthesis & Integration, IMRE, Singapore

 2009 - 2015 : Scientist I, IMRE, Singapore

 2008 - 2009 : Post-Doc, Imperial College London, Nanostructured Materials and Devices Group,
                      Dept. of Chemistry, Imperial College London, U.K.

 2003 : Intern, Shell Global Solutions, Amsterdam, Netherlands

 1.  Ph.D. in Chemistry, Imperial College London, U.K., 2008

 2.  M.Eng. in Chemical Engineering, Imperial College London, U.K., 2004

 2002 - 2003 : Dean's List, Carnegie-Mellon University, U.S.A.

 2004 : Shell Prize, Imperial College London, U.K.

 2004 - 2008 : AIP Scholarship (A*STAR)

 2004 - Current : Member, Materials Research Society Singapore

 1.  "Effect of Phonons on Valley Depolarization in Monolayer WSe2", C. Vijila, A.L.C. Pang, S. Sarkar,
 Z.-E. Ooi, K.E.J. Goh, Electron. Mater. Lett. 2018, 14, 766.

 2.  "Roadmap on finding chiral valleys : screening 2D materials for valleytronics", F. Bussolotti, H. Kawai,
 Z.-E. Ooi, C. Vijila, D. Thian, A.L.C. Pang, K.E.J. Goh, IOP Nano Futures 2018, 2, 032001.

 3.  "Quantifying the Usefulness of Oxide-Encapsulated Silver Nanoparticles in Semiconducting Films",
 W.P. Goh, Z.-E. Ooi, S. Mhaisalkar, W.S. Koh, Plasmonics 2016, DOI: 10.1007/s11468-016-0433-9

 4.  "Identifying Fundamental Limitations in Halide Perovskite Solar Cells", W.L. Leong, Z.-E. Ooi,
 D. Sabba, C. Yi, S.M. Zakeeruddin, M. Graetzel, J.M. Gordon, E.A. Katz, N. Mathews, Adv. Mater. 2016,
 28, 2439.

 5.  "Optimal Shell Thickness of Metal@Insulator Nanoparticles for Net Enhancement of Photogenerated
 Polarons in P3HT Films", W.P. Goh, E.L. Williams, R.-B. Yang, W.S.Koh, S.G. Mhaisalkar, Z.-E. Ooi,
 ACS Appl. Mater. Interfaces 2016, 8, 2464.

 6.  "Photoconductivity and photoconductive gain in organic bulk heterojunction materials", K. Liang,
 E. Danielson, Z.-E. Ooi, A. Dodabalapur, IEEE Trans. Electron Dev. 2015, 62, 2620. 

 7.  "Optical characterization of the hole polaron in a series of Diketopyrrolopyrrole polymers used
 for Organic Photovoltaics", E.L. Williams, T.S. Ang, Z.-E. Ooi, P. Sonar, T.T. Lin, W.T. Neo, J. Song,
 J. Hobley, Polymers 2015, 7, 69.

 8.  "Use of lateral structures to monitor and evaluate degradation of key photovoltaic parameters
 in an organic bulk heterojunction material", E. Danielson, Z.-E. Ooi, A. Dodabalapur, J. Appl. Phys.
 2014, 116, 214507.

 9.  "Analysis of bulk heterojunction material parameters using lateral device structures", E. Danielson,
 Z.-E. Ooi, K. Liang, J. Morris, C. Lombardo, A. Dodabalapur, J. Photonics Energy 2014, 4, 040994.

 10. "Evaluating Charge Carrier Mobility Balance in Organic Bulk Heterojunctions using Lateral Device
 Structures", Z.-E. Ooi, E. Danielson, K. Liang, C. Lombardo, A. Dodabalapur, J. Phys. Chem. C 2014,

 118, 18299.

 11. "Enhancing solution processed bulk-heterojunction solar cells performance using hydrogen-bonding
 induced self-organization of small molecules", K.H. Lam, T.R.B. Foong, Z.-E. Ooi, J. Zhang, A.C.

 Grimsdale, Y.M. Lam, ACS Appl. Mater. Interfaces 2013, 5, 13265.

 12. "Quantifying space charge accumulation in organic bulk heterojunctions by nonlinear optical
 microscopy", J.D. Morris, T.L. Atallah, H. Park, Z.-E. Ooi, A. Dodabalapur, X.-Y. Zhu, Org. Electron.

 2013, 14, 3014.

 13. "Enchanced extraction rates through gap states of molybdenum oxide anode buffer", B.Dasgupta,
 W.P. Goh, Z.-E. Ooi, L.M. Wong, C.Y. Jiang, Y. Ren, E.S. Tok, J. Pan, J. Zhang, S.Y. Chiam,

 J. Phys. Chem. C 2013, 117, 9206.

 14. "Device physics and operation of lateral bulk heterojunction devices", C.J. Lombardo,
 E.L. Danielson, M.S. Glaz, Z.-E. Ooi, D.A. Vanden Bout, A. Dodabalapur, J. Phys. Chem. B 2013,

 117, 4503.

 15. "Bimolecular recombination coefficient calculation by in situ potentiometry in a bulk heterojunction
 organic photovoltaic material", E. Danielson, Z.-E. Ooi, C.J. Lombardo, A. Dodabalapur, Appl. Phys.

 Lett. 2013, 102, 173304.

 16. "Measurement of contact voltage drop and resistance in organic solar cells", E.L. Williams,
 Z.-E. Ooi, P. Sonar, A. Dodabalapur, Appl. Phys. Lett. 2012, 101, 253902.

 17. "6,13-Dicyano pentacene-2,3:9,10-bis(dicarboximide) for solution-processed air-stable n-channel
 field effect transistors and complementary circuit", J. Chang, H. Qu, Z.-E. Ooi, J. Zhang, Z. Chen,

 J. Wu, C. Chi J. Mater. Chem. C 2012, 1, 456.

 18. "Scanning photocurrent microscopy of lateral organic bulk heterojunctions", C.J. Lombardo,
 M.S. Glaz, Z.-E. Ooi, D.A. Vanden Bout, A. Dodabalapur, Phys. Chem. Chem. Phys. 2012, 14, 13199.

 19. "ZnO layers for opto-electronic applications from solution-based and low-temperature processing
 of an organometallic precursor", T.R.B. Foong, S.P. Singh, P. Sonar, Z.-E. Ooi, K.L. Chan,

 A. Dodabalapur, J. Mater. Chem. 2012, 22, 20896.

 20. "Analysis of photocurrents in lateral-geometry organic bulk-heterojunction devices", Z.-E. Ooi,
 K.L. Chan, C.J. Lombardo, A. Dodabalapur, Appl. Phys. Lett. 2012, 101, 053301.

 21. "Poly(2,5-bis(2-octyldodecyl)-3,6-di(furan-2-yl)-2,5-dihydro-pyrrolo[3,4-c]-pyrrole-1,4-dione-co-
 thieno-[3,2-b]thiophene): a high performance polymer semiconductor for both organic thin-film
 transistors and organic photovoltaics", Y. Li, P. Sonar, S.P. Singh, Z.-E. Ooi, E.S.H. Lek, M.Q.Y. Loh,

 Phys. Chem. Chem. Phys. 2012, 14, 7162.

 22. "Electrical characteristics of lateral organic bulk heterojunction device structures", C. Lombardo,
Z.-E. Ooi, E. Danielson, A. Dodabalapur, Org. Electron. 2012, 13, 1185.

 23. "Lateral mobility measurements in organic bulk heterojunctions: comparison of field-effect
 and space-charge mobilities", C. Lombardo, E. Danielson, Z.-E. Ooi, A. Dodabalapur,

 Journal of Photonics for Energy 2012, 2, 021007.

 24. "A light-emitting transistor based on a hybrid metal oxide-organic semiconductor lateral
 heterostructure", Z.-E. Ooi, T.R.B. Foong, S.P. Singh, K.L. Chan, A. Dodabalapur, Appl. Phys.

 Lett. 2012, 100, 093302.

 25. "Investigating the stability of defects in MoO3 and its role in organic solar cells", S.Y. Chiam,
 B. Dasgupta, D. Soler, M.Y. Leung, H. Liu, Z.-E. Ooi, L.M. Wong, C.Y. Jiang, K.L. Chang, J. Zhang,

 Sol. Energ. Mat. Sol. C. 2012, 99, 197.

 26. "Analysis and modelling of lateral heterostructure field-effect bipolar transistors" Z.-E. Ooi,
 S. P. Singh, S. L. G. Ng, G. K. L. Goh, A. Dodabalapur, Org. Electron. 2011, 12, 1794.

 27. "High mobility organic thin film transistor and efficient photovoltaic devices using versatile
 donor-acceptor polymer semiconductor by molecular design ", P. Sonar, S. P. Singh, Y. Li, Z.-E. Ooi,
 T.-J. Ha, I. Wong, M. S. Soh and A. Dodabalapur, Energy Environ. Sci., 2011, 4, 2288.

 28. "Electrical characteristics of zinc oxide-organic semiconductor lateral heterostructure-based hybrid
 field-effect bipolar transistors", S. P. Singh, Z.-E. Ooi, S. L. G. Ng, G. K. L. Goh, A. Dodabalapur,
 Appl. Phys. Lett., 2011, 98, 073302.

 29. "Solution processable bulk-heterojunction solar cells using a small molecule acceptor", Z.E. Ooi,
 T.L. Tam, R.Y.C. Shin, Z.K. Chen, T. Kietzke, A. Sellinger, M. Baumgarten, K. Mullen, J.C. deMello,
 J. Mater. Chem., 2008, 18, 4619.

 30. "Field-dependent carrier generation in bulk heterojunction solar cells", Z.E. Ooi, T.L. Tam,
 A. Sellinger, J.C. deMello, Energy Environ. Sci., 2008, 1, 300. (Journal inside front cover)

 31. "On the pseudo-symmetric current-voltage response of bulk heterojunction solar cells", Z.E. Ooi,
 R. Jin, J. Huang, Y.F. Loo, A. Sellinger, J.C. deMello, J. Mater. Chem., 2008, 18, 1644.
 (Journal front cover)


 1.  A cryogenic circular dichroic photoluminescence microscope
      PCT Application No. 10201801455U

 2.  Sensing device for measuring a level of an anlayte, method of fabrication thereof
      PCT Application No. PCT/SG2016/050256

 3.  Display sheets, poster display devices and methods of displaying a poster
PCT Application No. PCT/SG2016/050323

 4.  Printed Circuits for Sensing, Signal Amplification and Display
PCT Patent Application No. 10201504195W

 5.  Hyperspectral Imaging Apparatus and Method
PCT Patent Application No. PCT/SG2016/050376

Last updated on : 02 Apr 2019 03:40 PM