Stable organic-inorganic hybrid multilayered photoelectrochemical cells

Park, Sunyoung; Kim, Min-Gyeong; Jung, Jae Hyun; Heo, Jinhee; Hong, Eun Mi; Choi, Sung Mook; Lee, Joo‐Yul; Cho, Shinuk; Hong, Kihyon; Lim, Dong Chan

doi:10.1016/j.jpowsour.2016.12.017

Cited by 18 publications

(11 citation statements)

References 32 publications

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“…[22] As shown in Figure 1, P3HT and PCBM form a bulk heterojunction due to a special energy level arrangement between them. Under illumination, photogenerated electrons from organic donors are transferred to organic acceptors to form excitons with photogenerated holes, [23] and excitons are separated at the interface between organic donors and acceptors in bulk heterojunction, which improves the separation ability of excitons. Furthermore, in order to promote the movement of photogenerated holes to the counter electrode and prevent the movement of photogenerated electrons to the counter electrode, a hole transport layer (i. e. electron blocking layer) should be introduced between the P3HT : PCBM organic absorption layer and the FTO substrate.…”

Section: Resultsmentioning

confidence: 99%

Organic Photocathode Supported by Copper Nanosheets Array for Overall Water Splitting

Zhang

Sun

Zheng

et al. 2021

Chemistry A European J

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The Z-scheme overall solar water splitting is a mimic of natural photosynthesis to convert solar energy into chemical energy. Since the energy levels of most organic semiconductors match well with the hydrogen evolution potential, they have great application prospects as photocathodes in Z-scheme photoelectrochemical systems. However, due to the weak light absorption and difficult carrier separation, the photocurrent density and onset potential of organic photocathodes are still low. To solve these problems, we introduced a copper nanosheets array (Cu NSA) framework under organic layers to increase the surface reaction sites, improve the light absorption and enhance the distribution range of built-in electric field simultaneously. As a result, the photocurrent density and onset potential of poly(3-hexylthiophene) : [6,6]-phenyl-C 61 -butyric acid (P3HT : PCBM) photocathode were enhanced significantly. The onset potential increased by 50 mV to 0.65 V vs. RHE, and the photocurrent density reached À 1 mA cm À 2 at 0 V vs. RHE, which was 18 times that of the sample without Cu NSA. The optimized photocathode was connected with titanium dioxide nanorods array photoanode in a tandem manner to realize the spontaneous overall water splitting. Without bias and co-catalyst, the photocurrent density was maintained at 110 μA cm À 2 and the solar-to-fuel conversion efficiency was 0.14 % in neutral solution. These results provide a feasible method for optimizing the performance of organic photocathodes.

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Section: Resultsmentioning

confidence: 99%

Organic Photocathode Supported by Copper Nanosheets Array for Overall Water Splitting

Zhang

Sun

Zheng

et al. 2021

Chemistry A European J

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“…Recently, Co 2+ salt-modified S-gC 3 N 4 /BiOCl, prepared by a simple ultrasonically aided hydrothermal method, was reported to have an evident enhancement of the photocurrent density, 212 which was measured as 0.393 mA/cm 2 for Co-S-gC 3 N 4 /BiOCl, ∼3-fold higher than S-gC 3 N 4 /BiOCl (1.23 V vs RHE). Similarly, a Nibased inorganic OER catalyst also has enormous potential to modify polymer photoanodes; the yet reported candidates are just briefly summarized here, including NiOOH, 215 Ni-(OH) 2 , 216 Ni salt, 217 NiFeO x , 218 NiO x , 219 and the Ni-Co catalyst. 108…”

Section: Molecular and Electro-cocatalystsmentioning

confidence: 99%

Polymer Photoelectrodes for Solar Fuel Production: Progress and Challenges

et al. 2022

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Converting solar energy to fuels has attracted substantial interest over the past decades because it has the potential to sustainably meet the increasing global energy demand. However, achieving this potential requires significant technological advances. Polymer photoelectrodes are composed of earth-abundant elements, e.g. carbon, nitrogen, oxygen, hydrogen, which promise to be more economically sustainable than their inorganic counterparts. Furthermore, the electronic structure of polymer photoelectrodes can be more easily tuned to fit the solar spectrum than inorganic counterparts, promising a feasible practical application. As a fast-moving area, in particular, over the past ten years, we have witnessed an explosion of reports on polymer materials, including photoelectrodes, cocatalysts, device architectures, and fundamental understanding experimentally and theoretically, all of which have been detailed in this review. Furthermore, the prospects of this field are discussed to highlight the future development of polymer photoelectrodes.

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“…In addition, by tuning the deposition method, this work established that increasing the surface area of the OSC/water interface helped to increase the rate of the solar-driven oxidation reaction. However, the most stable TF-PEC photoanodes to date used reduced graphene oxide (rGO) as an overlayer, with nanoNi or NiOOH as water oxidation catalyst, as demonstrated by Swiegers and coworkers [98] and Chan Lim and coworkers [99] respectively. While Chan Lim's photoanode consisted of an organic BHJ donor:acceptor (P3HT:PC 61 BM) blend as the photoactive layer, the photoanode of Swiegers aided the intrinsic electrocatalytic ability of Pt by depositing an OSC, (EDOT) n , over it.…”

Section: ± 7%mentioning

confidence: 99%

“…rGO/ NiO-OH/ (EDOT) n :PSS/ P3HT:PC 61 BM (1:1; 100 nm)/ ZnO/ ITO [99] 100 mW.cm -2 ; AM 1.5G >1.0×10 -4 @ 1.23 Stable at ~6.0×10 -5 after 4 hr 0.1 M Na 2 SO 4 at pH ~13.0 -ZnO(<2 nm)/ PC 71 BM (~60 nm)/ ITO [110] 100 mW.cm -2 ; AM 1.5G <1.5×10 -5 @ 1. (EDOT) n / Pt/ FTO [98] 0.25 sun intensity 5.5×10 -4 @ 1.7 6.0×10 -4 after 50 hr 0.2 M Na 2 SO 4 at pH 12 >99.9% C12/ TiO 2 nanorods (250 nm)/FTO [111] Xe lamp;…”

Section: ±16%mentioning

confidence: 99%

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

Sekar¹,

Sivula

2021

Chimia

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The direct conversion of solar energy into chemical fuels, such as hydrogen, via photoelectrochemical (PEC) water splitting requires the efficient oxidation of water at a photoanode. While transition metal oxides have shown a significant success as photoanodes, their intrinsic limitations make them the bottleneck of PEC water splitting. Recently, initial research reports suggest that organic semiconductors (OSCs) could be possible alternative photoanode materials in both dye-sensitized and thin film photoelectrode configurations. Herein we review the progress to date, with a focus on the major issues faced by OSCs: stability and low photocurrent density in aqueous photoelectrochemical conditions. An outlook to the future of OSCs in photoelectrochemistry is also given.

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Stable organic-inorganic hybrid multilayered photoelectrochemical cells

Cited by 18 publications

References 32 publications

Organic Photocathode Supported by Copper Nanosheets Array for Overall Water Splitting

Organic Photocathode Supported by Copper Nanosheets Array for Overall Water Splitting

Polymer Photoelectrodes for Solar Fuel Production: Progress and Challenges

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

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