High-Efficiency Photovoltaic Devices using Trap-Controlled Quantum-Dot Ink prepared via Phase-Transfer Exchange
- Authors
- Aqoma, H[Aqoma, Havid]; Al Mubarok, M[Al Mubarok, Muhibullah]; Hadmojo, WT[Hadmojo, Wisnu Tantyo]; Lee, EH[Lee, Eun-Hye]; Kim, TW[Kim, Tae-Wook]; Ahn, TK[Ahn, Tae Kyu]; Oh, SH[Oh, Seung-Hwan]; Jang, SY[Jang, Sung-Yeon]
- Issue Date
- 17-May-2017
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- phase-transfer exchange; quantum dots; solar cells; surface traps; voltage loss
- Citation
- ADVANCED MATERIALS, v.29, no.19
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED MATERIALS
- Volume
- 29
- Number
- 19
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/28983
- DOI
- 10.1002/adma.201605756
- ISSN
- 0935-9648
- Abstract
- 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.
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Collections - Graduate School > Energy Science > 1. Journal Articles
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