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

被引:122
作者
Aqoma, Havid [1 ]
Al Mubarok, Muhibullah [1 ]
Hadmojo, Wisnu Tantyo [1 ]
Lee, Eun-Hye [2 ]
Kim, Tae-Wook [2 ]
Ahn, Tae Kyu [3 ]
Oh, Seung-Hwan [4 ]
Jang, Sung-Yeon [1 ]
机构
[1] Kookmin Univ, Dept Chem, 77 Jeongneung Ro, Seoul 136702, South Korea
[2] Korea Inst Sci & Technol, Inst Adv Composite Mat, Soft Innovat Mat Res Ctr, Joellabuk Do 565905, South Korea
[3] Sungkyunkwan Univ, Dept Energy Sci, 2066 Seobu Ro, Suwon 440746, South Korea
[4] Korea Atom Energy Res Inst, Radiat Res Div Ind & Environm, 29 Geumgu Gil, Jeongeup Si 580185, Jeollabuk Do, South Korea
基金
新加坡国家研究基金会;
关键词
phase-transfer exchange; quantum dots; solar cells; surface traps; voltage loss; COLLOIDAL PBS NANOCRYSTALS; LEAD HALIDE PEROVSKITES; PROCESSED SOLAR-CELLS; SUB-BANDGAP STATES; THIN-FILMS; PERFORMANCE; SOLIDS; PASSIVATION; SURFACE; LAYERS;
D O I
10.1002/adma.201605756
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
收藏
页数:7
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