High-Efficiency Photovoltaic Devices using Trap-Controlled Quantum-Dot Ink prepared via Phase-Transfer Exchange

Havid Aqoma, Muhibullah Al Mubarok, Wisnu Tantyo Hadmojo, Eun Hye Lee, Tae Wook Kim, Tae Kyu Ahn, Seung Hwan Oh, Sung Yeon Jang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

109 Scopus citations


Colloidal-quantum-dot (CQD) photovoltaic devices are promising candidates for low-cost power sources owing to their low-temperature solution processability and bandgap tunability. A power conversion efficiency (PCE) of >10% is achieved for these devices; however, there are several remaining obstacles to their commercialization, including their high energy loss due to surface trap states and the complexity of the multiple-step CQD-layer-deposition process. Herein, high-efficiency photovoltaic devices prepared with CQD-ink using a phase-transfer-exchange (PTE) method are reported. Using CQD-ink, the fabrication of active layers by single-step coating and the suppression of surface trap states are achieved simultaneously. The CQD-ink photovoltaic devices achieve much higher PCEs (10.15% with a certified PCE of 9.61%) than the control devices (7.85%) owing to improved charge drift and diffusion. Notably, the CQD-ink devices show much lower energy loss than other reported high-efficiency CQD devices. This result reveals that the PTE method is an effective strategy for controlling trap states in CQDs.

Original languageEnglish (US)
Article number1605756
JournalAdvanced Materials
Issue number19
StatePublished - May 17 2017


  • phase-transfer exchange
  • quantum dots
  • solar cells
  • surface traps
  • voltage loss

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'High-Efficiency Photovoltaic Devices using Trap-Controlled Quantum-Dot Ink prepared via Phase-Transfer Exchange'. Together they form a unique fingerprint.

Cite this