Opto-electronic properties of TiO2 nanohelices with embedded HC(NH2)2PbI3 perovskite solar cells

Jin Wook Lee, Seung Hee Lee, Hyun Seok Ko, Jeong Kwon, Jong Hyeok Park, Seong Min Kang, Namyoung Ahn, Mansoo Choi, Jong Kyu Kim, Nam Gyu Park

Research output: Contribution to journalArticle

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Abstract

A HC(NH2)2PbI3 solar cell of perovskite structure based on TiO2 nanohelices has been developed. Well-aligned helical TiO2 arrays of different pitch (p) and radius (r), helix-1 (p/2 = 118 nm, r = 42 nm), helix-2 (p/2 = 353 nm, r = 88 nm) and helix-3 (p/2 = 468 nm, r = 122 nm), were grown on fluorine-doped tin oxide (FTO) glass by oblique-angle electron beam evaporation. HC(NH2)2PbI3 perovskite was deposited on the TiO2 nanohelices by a two-step dipping method. Helix-1 showed higher short-circuit current density (JSC), whereas helix-3 exhibited slightly higher open-circuit voltage (VOC). HC(NH2)2PbI3 perovskite combined with helix-1 demonstrated an average power conversion efficiency of 12.03 ± 0.07% due to its higher JSC compared to helix-2 and helix-3. The higher JSC of helix-1 could be attributed to its greater light scattering efficiency and higher absorbed photon-to-current conversion efficiency. In addition, despite having the longest pathway structure, helix-1 showed rapid electron diffusion, attributed to its higher charge injection efficiency due to the larger contact area between perovskite and TiO2. We have established that fine tuning of the interface between perovskite and the electron-injecting oxide is a crucial factor in achieving a perovskite solar cell of high performance.

Original languageEnglish
Pages (from-to)9179-9186
Number of pages8
JournalJournal of Materials Chemistry A
Volume3
Issue number17
DOIs
Publication statusPublished - 2015 May 7

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Electronic properties
Perovskite
Conversion efficiency
Charge injection
Fluorine
Electrons
Open circuit voltage
Tin oxides
Volatile organic compounds
Short circuit currents
Light scattering
Oxides
Electron beams
Solar cells
Evaporation
Current density
Photons
Tuning
Perovskite solar cells
perovskite

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Lee, Jin Wook ; Lee, Seung Hee ; Ko, Hyun Seok ; Kwon, Jeong ; Park, Jong Hyeok ; Kang, Seong Min ; Ahn, Namyoung ; Choi, Mansoo ; Kim, Jong Kyu ; Park, Nam Gyu. / Opto-electronic properties of TiO2 nanohelices with embedded HC(NH2)2PbI3 perovskite solar cells. In: Journal of Materials Chemistry A. 2015 ; Vol. 3, No. 17. pp. 9179-9186.
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title = "Opto-electronic properties of TiO2 nanohelices with embedded HC(NH2)2PbI3 perovskite solar cells",
abstract = "A HC(NH2)2PbI3 solar cell of perovskite structure based on TiO2 nanohelices has been developed. Well-aligned helical TiO2 arrays of different pitch (p) and radius (r), helix-1 (p/2 = 118 nm, r = 42 nm), helix-2 (p/2 = 353 nm, r = 88 nm) and helix-3 (p/2 = 468 nm, r = 122 nm), were grown on fluorine-doped tin oxide (FTO) glass by oblique-angle electron beam evaporation. HC(NH2)2PbI3 perovskite was deposited on the TiO2 nanohelices by a two-step dipping method. Helix-1 showed higher short-circuit current density (JSC), whereas helix-3 exhibited slightly higher open-circuit voltage (VOC). HC(NH2)2PbI3 perovskite combined with helix-1 demonstrated an average power conversion efficiency of 12.03 ± 0.07{\%} due to its higher JSC compared to helix-2 and helix-3. The higher JSC of helix-1 could be attributed to its greater light scattering efficiency and higher absorbed photon-to-current conversion efficiency. In addition, despite having the longest pathway structure, helix-1 showed rapid electron diffusion, attributed to its higher charge injection efficiency due to the larger contact area between perovskite and TiO2. We have established that fine tuning of the interface between perovskite and the electron-injecting oxide is a crucial factor in achieving a perovskite solar cell of high performance.",
author = "Lee, {Jin Wook} and Lee, {Seung Hee} and Ko, {Hyun Seok} and Jeong Kwon and Park, {Jong Hyeok} and Kang, {Seong Min} and Namyoung Ahn and Mansoo Choi and Kim, {Jong Kyu} and Park, {Nam Gyu}",
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Lee, JW, Lee, SH, Ko, HS, Kwon, J, Park, JH, Kang, SM, Ahn, N, Choi, M, Kim, JK & Park, NG 2015, 'Opto-electronic properties of TiO2 nanohelices with embedded HC(NH2)2PbI3 perovskite solar cells', Journal of Materials Chemistry A, vol. 3, no. 17, pp. 9179-9186. https://doi.org/10.1039/c4ta04988h

Opto-electronic properties of TiO2 nanohelices with embedded HC(NH2)2PbI3 perovskite solar cells. / Lee, Jin Wook; Lee, Seung Hee; Ko, Hyun Seok; Kwon, Jeong; Park, Jong Hyeok; Kang, Seong Min; Ahn, Namyoung; Choi, Mansoo; Kim, Jong Kyu; Park, Nam Gyu.

In: Journal of Materials Chemistry A, Vol. 3, No. 17, 07.05.2015, p. 9179-9186.

Research output: Contribution to journalArticle

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T1 - Opto-electronic properties of TiO2 nanohelices with embedded HC(NH2)2PbI3 perovskite solar cells

AU - Lee, Jin Wook

AU - Lee, Seung Hee

AU - Ko, Hyun Seok

AU - Kwon, Jeong

AU - Park, Jong Hyeok

AU - Kang, Seong Min

AU - Ahn, Namyoung

AU - Choi, Mansoo

AU - Kim, Jong Kyu

AU - Park, Nam Gyu

PY - 2015/5/7

Y1 - 2015/5/7

N2 - A HC(NH2)2PbI3 solar cell of perovskite structure based on TiO2 nanohelices has been developed. Well-aligned helical TiO2 arrays of different pitch (p) and radius (r), helix-1 (p/2 = 118 nm, r = 42 nm), helix-2 (p/2 = 353 nm, r = 88 nm) and helix-3 (p/2 = 468 nm, r = 122 nm), were grown on fluorine-doped tin oxide (FTO) glass by oblique-angle electron beam evaporation. HC(NH2)2PbI3 perovskite was deposited on the TiO2 nanohelices by a two-step dipping method. Helix-1 showed higher short-circuit current density (JSC), whereas helix-3 exhibited slightly higher open-circuit voltage (VOC). HC(NH2)2PbI3 perovskite combined with helix-1 demonstrated an average power conversion efficiency of 12.03 ± 0.07% due to its higher JSC compared to helix-2 and helix-3. The higher JSC of helix-1 could be attributed to its greater light scattering efficiency and higher absorbed photon-to-current conversion efficiency. In addition, despite having the longest pathway structure, helix-1 showed rapid electron diffusion, attributed to its higher charge injection efficiency due to the larger contact area between perovskite and TiO2. We have established that fine tuning of the interface between perovskite and the electron-injecting oxide is a crucial factor in achieving a perovskite solar cell of high performance.

AB - A HC(NH2)2PbI3 solar cell of perovskite structure based on TiO2 nanohelices has been developed. Well-aligned helical TiO2 arrays of different pitch (p) and radius (r), helix-1 (p/2 = 118 nm, r = 42 nm), helix-2 (p/2 = 353 nm, r = 88 nm) and helix-3 (p/2 = 468 nm, r = 122 nm), were grown on fluorine-doped tin oxide (FTO) glass by oblique-angle electron beam evaporation. HC(NH2)2PbI3 perovskite was deposited on the TiO2 nanohelices by a two-step dipping method. Helix-1 showed higher short-circuit current density (JSC), whereas helix-3 exhibited slightly higher open-circuit voltage (VOC). HC(NH2)2PbI3 perovskite combined with helix-1 demonstrated an average power conversion efficiency of 12.03 ± 0.07% due to its higher JSC compared to helix-2 and helix-3. The higher JSC of helix-1 could be attributed to its greater light scattering efficiency and higher absorbed photon-to-current conversion efficiency. In addition, despite having the longest pathway structure, helix-1 showed rapid electron diffusion, attributed to its higher charge injection efficiency due to the larger contact area between perovskite and TiO2. We have established that fine tuning of the interface between perovskite and the electron-injecting oxide is a crucial factor in achieving a perovskite solar cell of high performance.

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