1^st author

1. J. H. Heo¹, S. H. Im¹, H. –j. Kim, P. P. Boix , S. I. Seok, I. Mora- Seró, J. Bisquert, “Sb₂S₃-sensitized Photoelectrochemical Cells: Open Circuit Voltage Enhancement through the Introduction of Poly-3-hexylthiophene Interlayer”, J. Phys. Chem. C, 116, 20717-20721 (2012).

2. J. H. Heo, M. S. You, S. H. Im*, "A study on formation of vertically aligned ZnO nanorods arrays on a rough FTO transparent electrode by the introduction of TiO₂ crystalline nano-sol blocking interlayer", Korean Chem. Eng. Res., 51, 774-779 (2013).

3. J. H. Noh¹, S. H. Im¹, J. H. Heo¹, T. N. Mandal, S. I. Seok, “Chemical management for colorful, efficient, and stable inorganic-organic hybrid nanostructured solar cells”, Nano Lett., 13, 1764-1769 (2013).

4. J. H. Heo¹, S. H. Im¹, J. H. Noh¹, T. N. Mandal, C. –S. Lim, J. A. Chang, Y. H. Lee, H. –j. Kim, A. Sarkar, S. I. Seok*, Md. K. Nazeeruddin, M. Grätzel*, “High-performance inorganic-organic hybrid heterojunction solar cells”, Nature Photonics, 7, 486-491 (2013)

5. Y. H. Lee¹, J. H. Heo¹, S. H. Im, H. –j. Kim, C.-S. Lim, T. K. Ahn, S. I. Seok*, “Improvement of nonlinear response for the power conversion efficiency with light intensities in cobalt complex electrolyte system”, Chem. Phys. Lett., 573, 63-69 (2013).

6. S. Kim¹, J. H. Heo¹, J. H. Noh, S. -W. Kim*, S. H. Im*, S. I. Seok*, "PbS colloidal quantum-dots-sensitized inorganic-organic hybrid solar cells with radial-directional charge transport", ChemPhysChem, 15, 1024–1027 (2014).

7. J. H. Heo, S. H. Im*, "CH₃NH₃PbI₃/poly-3-hexylthiophene perovskite mesoscopic solar cells: Performance enhancement by Li-assisted hole conduction", Phys. Status Solidi RRL, 8, 816-821 (2014).

8. J. H. Heo, D. H. Song, S. H. Im*, "10.4% of planar CH₃NH₃PbBr₃ hybrid solar cells fabricated by controlled crystallization in spin-coating process", Adv. Mater., 26, 8719-8783 (2014).

9. S. Park¹, J. H. Heo¹, C. H. Cheon, H. Kim, S. H. Im*, H. J. Son*, "[2,2]Paracyclophane triarylamine-based hole-transporting materials for high performance perovskite solar cells", J. Mater. Chem. A, 3, 24215-24220 (2015).

10. J. H. Heo, H. J. Han, M. H. Lee, M. Song, D. H. Kim, S. H. Im*, "Stable semi-transparent CH₃NH₃PbI₃ planar sandwich solar cells", Energy Environ. Sci., 8, 2922-2927 (2015).

11. J. H. Heo, H. J. Han, D. Kim, T. K Ahn, S. H. Im*, "Hysteresis-less inverted CH₃NH₃PbI₃ planar perovskite hybrid solar cells with 18.1% power conversion efficiency", Energy Environ. Sci., 8, 1602-1608 (2015).

12. Y.-H. Kim¹, H. Cho¹, J. H. Heo¹, T.-S. Kim, N. Myoung, C.-L. Lee, S. H. Im,*, T.-W. Lee*, "Multi-colored Organic/Inorganic Hybrid Perovskite Light-emitting Diodes", Adv. Mater., 27, 1248-1254 (2015).

13. J. H. Heo, D. H. Song, H. J. Han, S. Y. Kim, J. H. Kim, D. Kim, H. W. Shin, T. K Ahn, C. Wolf, T. -W. Lee, S. H. Im*, "Planar CH₃NH₃PbI₃ perovskite solar cells with constant 17.2% average power conversion efficiency irrespective of the scan rate", Adv. Mater., 27, 3424-3430 (2015).

14. J. H. Heo, M. S. You, M. H. Chang, W. Yin, T. K. Ahn, S.-J. Lee, S.-J. Sung, D. H. Kim, S. H. Im*, "Hysteresis-less mesoscopic CH₃NH₃PbI₃ perovskite hybrid solar cells by introduction of Li-treated TiO₂ electrode", Nano Energy, 15, 530-539 (2015).

15. J. H. Heo, D. H. Song, B. R. Patil, S. H. Im*, "Recent progress of innovative perovskite hybrid solar cells", Israel J. Chem., 55, 966-977 (2015).

16. S. Park¹, J. H. Heo¹, J. H. Yun, T. S. Jung, K. Kwak, M. J. Ko, C. H. Cheon, J. Y. Kim, S. H. Im*, H. J. Son*, "Effect of multi-armed triphenylamine-based hole-transporting materials for high performance perovskite solar cells", Chemical Sci., 7, 5517-5522 (2016).

17. J. H. Heo, M. H. Jang, M. H. Lee, H. J. Han, M. G. Kang, M. L. Lee, S. H. Im*, "Efficiency enhancement of semi-transparent sandwich type CH₃NH₃PbI₃ perovskite solar cells with island morphology perovskite film by introduction of polystyrene passivation layer", J. Mater. Chem. A, 4, 16324-16329 (2016).

18. J. H. Heo, S. H. Im*, "Highly reproducible, efficient hysteresis-less CH₃NH₃PbI_3-xCl_x planar hybrid solar cells without requiring heat-treatment", Nanoscale, 8, 2554-2560 (2016).

19. J. H. Heo, M. H. Lee, M. H. Jang, S. H. Im*, "Highly efficient CH₃NH₃PbI_3-xCl_x mixed halide perovskite solar cells prepared by re-dissolution and crystal grain growth via spray coating", J. Mater. Chem. A, 4, 17636-17642 (2016).

20. B. Dudem¹, J. H. Heo¹, J. W. Lee, J. S. Yu*, S. H. Im*, "CH₃NH₃PbI₃ planar perovskite solar cells with antireflection and self-cleaning function layers", J. Mater. Chem. A, 4, 7573-7579 (2016).

21. J. H. Heo, M. H. Lee, H. J. Han, B. R. Patil, S. H. Im*, "Highly efficient low temperature solution processible planar type CH₃NH₃PbI₃ perovskite flexible solar cells", J. Mater. Chem. A, 4, 1572-1578 (2016).

22. J. K. Park¹, J. H. Heo¹, H. J. Han, M. H. Lee, D. H. Song, M. S. You, S.-J. Sung, D.-H. Kim, S. H. Im*, "Efficient hystresis-less bi-layer type CH₃NH₃PbI₃ perovskite hybrid solar cells", Nanotechnology, 27, 024004 (2016).

23. D. H. Song¹, J. H. Heo¹, S. H. Im*, "Formation of uniform CH₃NH₃PbI_3-xCl_x mixed halide perovskite film by one step spin-coating process", J. Power Source, 310, 130-136 (2016).

24. J. H. Heo, S. H. Im*, "CH₃NH₃PbBr₃-CH₃NH₃PbI₃ perovskite-perovskite tandem solar cells with exceeding 2.2V open circuit voltage", Adv. Mater., 28, 5121–5125 (2016).

25. M. Jahandar¹, J. H. Heo¹, C. E. Song, K.-J. Kong, W. S. Shin, J.-C. Lee, S. H. Im*, S.-J. Moon*, "Highly efficient metal halide substituted CH₃NH₃I(PbI₂)_1-X(CuBr₂)_X planar perovskite solar cells", Nano Energy, 27, 330-339 (2016).

26. J. H. Heo, M. H. Jang, M. H. Lee, M. S. You, J.-J. Lee, S.-W. Kim, S. H. Im*, "Formation of uniform PbS quantum dots by spin-assisted successive precipitation and anion exchange reaction process using PbX₂ (X = Br, I) and Na₂S precursor", RSC Adv., 7, 3072-3077 (2017).

27. S.-J. Ha¹, J. H. Heo¹, S. H. Im,* J. H. Moon* "Mesoscopic CH₃NH₃PbI₃ perovskite solar cells using TiO₂ inverse opal electron-conducting scaffolds", J. Mater. Chem. A, 310, 179–186 (2017).

28. J.-I. Park¹, J. H. Heo¹, S.-H. Park, K. I. Hong, H. G. Jung, S. H. Im,* H.-K. Kim*, "Highly flexible InSnO electrodes on thin colourless polyimide substrate for high-performance flexible CH₃NH₃PbI₃ perovskite solar cells", J. Power Source, 341, 340-347 (2017).

29. H. Choi¹, J. H. Heo¹, S. Ha¹, B. W. Kwon, S. P. Yoon, J. Han, W.-S. Kim, S. H Im, J. Kim, "Facile Scalable Synthesis of MoO₂ Nanoparticles by New Solvothermal Cracking Process and their Application to Hole Transporting Layer for CH₃NH₃PbI₃ Planar Perovskite Solar Cells", Chemical Eng. J., 310, 179-186 (2017).

30. J. H. Heo¹, M. Jahandar¹, S.-J. Moon, C. E. Song*, S. H. Im*, "Inverted flexible CH₃NH₃PbI₃ perovskite hybrid solar cells with improved flexibility by introduction of polymeric electron conductor" J. Mater. Chem. C, 5, 2883-2891 (2017).

31. J. H. Heo¹, D. H. Shin¹, S. Kim, M. H. Jang, M. H. Lee, S. W. Seo, S.-H. Choi,* S. H. Im*, "Highly efficient CH₃NH₃PbI₃ perovskite solar cells prepared by AuCl₃-doped graphene transparent conducting electrodes", Chem. Eng. J., 323, 153-159 (2017).

32. J. H. Heo¹, S.-C. Lee, S.-K. Jung, O.-P. Kwon*, S. H. Im*, "Efficient and thermally stable inverted perovskite solar cells by introduction of non-fullerene electron transporting material”, J. Mater. Chem. A, 5, 20615-20622 (2017).

33. J. H. Heo¹, D. H. Shin¹, M. H. Jang, M. L. Lee, M. G. Kang*, S. H. Im*, "Highly flexible, high-performance perovskite solar cells with adhesion promoted AuCl₃ doped graphene electrodes", J. Mater. Chem. A, 5, 21146-21152 (2017).

34. D. H. Shin¹, J. H. Heo¹, S. H. Im*, "Recent advances of flexible hybrid perovskite solar cells", J. Korean Phys. Soc., 71, 593-607 (2017).

35. J. H. Heo¹, S. Park¹, S. H. Im*, H. J. Son*, "Development of Dopant-free Donor-Acceptor-type Hole Transporting Material for Highly Efficient and Stable Perovskite Solar Cells", ACS Appl. Mater. & Interfaces, 9, 39511-39518 (2017).

36. J. H. Heo, D. H. Shin, S. H. Moon, M. H. Lee, D. H. Kim, S. H. Oh, W. Jo, S. H. Im*, "Memory effect behavior with respect to the crystal grain size in the organic-inorganic hybrid perovskite nonvolatile resistive random access memory", Scientific Rep., 7, 16586, (2017).

37. J. H. Heo, M. H. Jang, M. H. Lee, D. H. Shin, D. H. Kim. S. H. Moon, S. W. Kim, B. J. Park*, S. H. Im*, "High performance solid-state PbS quantum dot-sensitized solar cells prepared by introduction of hybrid perovskite interlayer", ACS Appl. Mater. & Interfaces, 9, 41104-41110 (2017).

38. K. Im¹, J. H. Heo¹, S. H. Im*, J. Kim*, "Scalable synthesis of Ti-doped MoO₂ nanoparticle-hole-transporting-material with high moisture stability for CH3NH3PbI3 perovskite solar cells", Chem. Eng. J., 330, 698-705 (2017).

39. C. W. Koh¹, J. H. Heo¹, M. A. Uddin, D. H. Choi, S. H. Im*, H. Y. Woo*, "Enhanced efficiency and long-term stability of perovskite solar cells by synergistic effect of non-hygroscopic doping in conjugated polymer-based hole transporting layer", ACS Appl. Mater. & Interfaces, 9, 43846-43854 (2017).

40. J. H. Heo, J. Han, D. H. Shin, S. H. Im*, "Highly stable semi-transparent CH₃NH₃PbI₃ sandwich type perovskite solar sub-module with neutral color", Mat. Today Energy, 5, 280-286 (2017).

41. J. H. Heo, M. H. Lee, D. H. Song, C. E. Song, J.-J. Lee*, K.-H. Hong*, S. H. Im*, "Planar type trivalent bismuth based Pb-free perovskite solar cells", Nanosci. Nanotechnol. Lett., in press.

42. J. H. Heo, M. H. Lee, D. H. Song, J.-J. Lee, C. E. Song*, K.-H. Hong*, S. H. Im*, "All inorganic Pb-free perovskite solar cells with high stability", J. Nanoelectron. Optoelectron., in press.

Coauthor

1. J. A. Chang, S. H. Im, Y. H. Lee, H. –j. Kim, C. –S. Lim, J. H. Heo, S. I. Seok, “Panchromatic photon-harvesting by hole-conducting materials in inorganic-organic heterojunction sensitized-solar cell through the formation of nanostructured electron channels”, Nano Lett., 12, 1863-1867 (2012).

2. S. W. Kim, S. H. Im, M. Kang, J. –H. Heo, S. –W. Kim, S. I. Seok, “Air-stable and efficient inorganic-organic heterojunction solar cells using PbS colloidal quantum dots co-capped by 1-dodecanethiol and oleic acid”, Phys. Chem. Chem. Phys., 14, 14999-15002 (2012).

3. S. Kim, M. Kang, S. Kim, J.-H. Heo, J. H. Noh, S. H. Im*, S. I. Seok*, S.-W. Kim*, “Fabrication of CuInTe₂ and CuInTe_2-xSe_x ternary gradient quantum dots and their application to solar cell”, ACS Nano, 7, 4756-4763 (2013).

4. D.-H. Kim, S.-J. Lee, M. S. Park, J. -K. Kang, J. H. Heo, S. H. Im*, S. J. Sung*, “Highly reproducible planar Sb₂S₃-sensitized solar cells based on atomic layer deposition”, Nanoscale, 6, 14549-14554 (2014).

5. C. -S. Lim, J. H. Heo, S. H. Im*, K. J. Chae*, "Robust and scale-up synthesis of hollow TiO₂ nanospheres with sub 100nm-scale by templating of PS-b-P2VP nanospheres", Macromol. Res., 22, 1-3 (2014).

6. C. -S. Lim, J. H. Heo, M. S. You, S. H. Im*, and K. J. Chae*, "Synthesis of PS-b-P2VP di-block copolymer particles with internal structure via simple reprecipitation method", Macromol. Res., 22, 324-328 (2014).

7. S. Kim. K. Lee, S. Kim, O.-P. Kwon, J. H. Heo, S. H. Im, S. Jeong, D. C. Lee*, S.-W. Kim*, "Origin of photoluminescence from colloidal gallium phosphide quantum dots synthesized via a hot injection method", RSC Adv., 5, 2466-2469 (2015).

8. J. P. Park, J. H. Heo, S. H. Im*, S.-W. Kim*, "Exceptional stability of Mg implementd PbS quantum dot solar cells by galvanic corrosion protection", J. Mater. Chem. A, 3, 8433-8437(2015).

9. M. S. You, C.-S. Lim, D. H. Kwon, J. H. Heo, S. H. Im*, K. J. Chae*, "Formation of oxide-free Sb₂S₃ by spin and heat-treatment of Sb(III)(thioacetamide)₂Cl₃", Org. Electron., 21, 155-159 (2015).

10. H. Cho, S.-H. Jeong, M.-H. Park, Y.-H. Kim, C. Wolf, C.-L. Lee, J. H. Heo, A. Sadhanala, N. S. Myoung, S. Yoo, S. H. Im, R. H. Friend, T. -W. Lee*, "Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes", Science, 4, 1222-1225 (2015).

11. J. P. Park, J. H. Heo, S. H. Im*, S.-W. Kim*, "Highly efficient solid-state mesoscopic PbS embedding CuS quantum dot-sensitized solar cells", J. Mater. Chem. A, 4, 785-790 (2016).

12. J. H Yun, S. Park, J. H Heo, H.-S. Lee, S. Yoon, J. Kang, S. H. Im, H. Kim, W. Lee, B.S. Kim, M. J. Ko, D. S. Chung, H. J. Son, "Enhancement of Charge Transport Properties of Small Molecule Semiconductors by Controlling Fluorine Substitution and Effects on Photovoltaic Properties of Organic Solar Cells and Perovskite Solar cells", Chemical Sci., 7, 6649–666 (2016).

13. S. S. Reddy, K. Gunasekar, J. H. Heo, S. H. Im, C. S. Kim, D.-H. Kim, J. H. Moon, J. Y. Lee, M. Song*, S.-H. Jin*, "Highly Efficient Organic Hole Transporting Materials for Perovskite and Organic Solar Cells with Long-Term Stability", Adv. Mater., 28, 686–693 (2016).

14. Y.-H. Kim, H. Cho, J. H. Heo, S. H. Im, T.-W. Lee*, "Effects of Heat Treatment on Organic-Inorganic Hybrid Perovskite Films and Luminous Efficiency of Light-Emitting Diodes", Current Applied Physics, 16, 1069–1074 (2016).

15. D.-H. Song, M. H. Jang, M. H. Lee, J. H. Heo, J. K. Park, S.-J. Sung, D.-H. Kim, K.-H. Hong, S. H. Im*, "Discussion on the origin and solutions of hysteresis in perovskite hybrid solar cells", J. Phys. D: Appl. Phys., 49, 473001 (2016).