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Organic-inorganic hybrid perovskite materials have excellent performance in optical, electrical and magnetic properties. The energy-band structure of the hybrid materials can be tuned at the molecular level. In this paper, thin films of hybrid perovskite (C6H13NH3)2(CH3NH3)n-1PbnI3n+1 (n=1, 2, 3, n is the number of two-dimensional inorganic-sheet) have been successfully prepared by a simple spin-coating method. The effects of the inorganic-sheet number (n) on the crystal structure, bandgap energy, exciton binding energy, photoluminescent emission and photocondunctive performance of the hybrid materials have been investigated systematically. With the increasing of inorganic-sheet number, the exciton absorption peak shows an obvious red shift, the bandgap becomes narrow, and the exciton binding energy decreases. Further, the exciton is separated into holes and electrons easily due to the expansion of the exciton Bohr radius and, moreover, the carrier mobilities are increased due to the increasing of inorganic-layer thickness. Consequently, the photocondunctivity of the films is greatly enhanced.
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Keywords:
- hybrid perovskite /
- quantum well /
- bandgap energy /
- photoelectrical properties
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[9] Zhu L H, Cai J F, Li X Y, Deng B, Liu B L 2010 Acta Phys. Sin. 59 4996(in Chinese)[朱丽虹、蔡加法、李晓莹、邓 彪、刘宝林 2010 59 4996]
[10] Kagan C R, Mitzi D B, Dimitrakopoulos C D 1999 Science 286 945
[11] Pradeesh K, Yadav G S, Singh M, Prakash G V 2010 Mater. Chem. Phys. 124 44
[12] Mitzi D B 1996 Chem. Mater. 8 791
[13] Li Y Y, Zheng G L, Lin C K, Lin J 2008 Cryst. Growth Des. 8 1990
[14] Mercier N, Poiroux S, Riou A, Batail P 2004 Inorg. Chem. 43 8361
[15] Braun M, Tuffentsamme W, Wachtel H, Wolf H C 1999 Chem. Phys. Lett. 307 373
[16] Lemmerer A, Billing D G 2010 Cryst. Eng. Comm. 12 1290
[17] Takeoka Y, Asai K, Rikukawa M, Sanui K 2001 Chem. Commun. 24 2592
[18] Era M, Yoneda S, Sano T, Noto M 2003 Thin Solid Films 438 322
[19] Cheng Z Y, Lin J 2010 Cryst. Eng. Comm 12 2646
[20] Tabuchi Y, Asai K, Rikukawa M, Sanui K, Ishigure K 2000 J. Phys. Chem. Solids 61 837
[21] Hartridge A, Krishna M G, Bhattacharya A K 1998 J. Phys. Chem. Solids 59 859
[22] Li C R, Cui M Y, Sun Q T, Dong W J, Zheng Y Y, Tsukamoto K, Tang W H 2010 J. Alloys Compound 504 498
[23] Tanaka K, Takahashi T, Kondo T, Umebayashi T, Asai K, Ema K 2005 Phys. Rev. B 71 045312
[24] Ema K, Inomata M, Kato Y, Kunugita H, Era M 2008 Phys. Rev. Lett. 100 257401
[1] Kojima A, Teshima K, Shirai Y, Miyasaka T 2009 J. Am. Chem. Soc. 131 6050
[2] Mitzi D B, Dimitrakopoulos C D, Rosner J, Medeiros D R, Xu Z, Noyan C 2002 Adv. Mater. 14 1772
[3] Shibuya K, Koshimizu M, Takeoka Y, Asai K 2002 Nucl.Instr. Meth. Phys.Res. B 194 207
[4] Mitzi D B 2001 J. Chem. Soc., Dalton Trans. 1 1
[5] Tanaka K, Kondo T 2003 Sci. Technol. Adv. Mater. 4 599
[6] Pradeesh K, Baumberg J J, Prakash G V 2009 Appl. Phys. Lett. 95 033309
[7] Kitazawa N, Watanabe Y 2010 J. Phys. Chem. Solids 71 797
[8] Ding Z B, Wang Q, Wang K, Wang H, Chen T X, Zhang G Y,Yao S D 2007 Acta Phys. Sin. 56 2873(in Chinese)[丁志博、王 琦、王 坤、王 欢、陈田祥、张国义、姚淑德 2007 56 2873]
[9] Zhu L H, Cai J F, Li X Y, Deng B, Liu B L 2010 Acta Phys. Sin. 59 4996(in Chinese)[朱丽虹、蔡加法、李晓莹、邓 彪、刘宝林 2010 59 4996]
[10] Kagan C R, Mitzi D B, Dimitrakopoulos C D 1999 Science 286 945
[11] Pradeesh K, Yadav G S, Singh M, Prakash G V 2010 Mater. Chem. Phys. 124 44
[12] Mitzi D B 1996 Chem. Mater. 8 791
[13] Li Y Y, Zheng G L, Lin C K, Lin J 2008 Cryst. Growth Des. 8 1990
[14] Mercier N, Poiroux S, Riou A, Batail P 2004 Inorg. Chem. 43 8361
[15] Braun M, Tuffentsamme W, Wachtel H, Wolf H C 1999 Chem. Phys. Lett. 307 373
[16] Lemmerer A, Billing D G 2010 Cryst. Eng. Comm. 12 1290
[17] Takeoka Y, Asai K, Rikukawa M, Sanui K 2001 Chem. Commun. 24 2592
[18] Era M, Yoneda S, Sano T, Noto M 2003 Thin Solid Films 438 322
[19] Cheng Z Y, Lin J 2010 Cryst. Eng. Comm 12 2646
[20] Tabuchi Y, Asai K, Rikukawa M, Sanui K, Ishigure K 2000 J. Phys. Chem. Solids 61 837
[21] Hartridge A, Krishna M G, Bhattacharya A K 1998 J. Phys. Chem. Solids 59 859
[22] Li C R, Cui M Y, Sun Q T, Dong W J, Zheng Y Y, Tsukamoto K, Tang W H 2010 J. Alloys Compound 504 498
[23] Tanaka K, Takahashi T, Kondo T, Umebayashi T, Asai K, Ema K 2005 Phys. Rev. B 71 045312
[24] Ema K, Inomata M, Kato Y, Kunugita H, Era M 2008 Phys. Rev. Lett. 100 257401
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