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The purpose of this study is to fabricate an ultraviolet (UV) metal-semiconductor-metal (MSM) photodetector based on zinc oxide nanorods (ZnO NRs) grown on seeded silicon (Si) substrate that was prepared by a low-cost method (drop-casting technique).

The drop-casting method was used for the seed layer deposition, the hydrothermal method was used for the growth of ZnO NRs and subsequent fabrication of UV MSM photodetector was done using the direct current sputtering technique. The performance of the fabricated MSM devices was investigated by current–voltage (I–V) measurements. The photodetection mechanism of the fabricated device was discussed.

Semi-vertically high-density ZnO (NRs) were effectively produced with a preferential orientation along the (002) direction, and increased crystallinity is confirmed by X-ray diffraction analysis. Photoluminescence results show a high UV region. The fabricated MSM UV photodetector showed that the ZnO (NRs) MSM device has great stability over time, high photocurrent, good sensitivity and high responsivity under 365 nm wavelength illumination and 0 V, 1 V, 2 V and 3 V applied bias. The responsivity and sensitivity for the fabricated ZnO NRs UV photodetector are 0.015 A W-1, 0.383 A W-1, 1.290 A W-1 and 1.982 A W-1 and 15,030, 42.639, 100.173 and 334.029, respectively, under UV light (365 nm) illumination at (0 V, 1 V, 2 V and 3 V).

This paper uses the drop-casting technique and the hydrothermal method as simple and low-cost methods to fabricate and improve the ZnO NRs photodetector.

The purpose of this study is to dope silver (Ag) and fluorine (F) in zinc oxide (ZnO) for the enhancement of electrical and optical properties of ZnO, as previous studies reported the improvement of these properties using individual doping of F and Ag. In this paper, F and Ag co-doped ZnO nanorods were synthesized using a modified hydrothermal method.

The hydrothermal method was modified and used for the synthesis of the doped ZnO nanostructures, where stainless autoclave and oven were replaced with the Duran laboratory bottle and water boiler system in the process. The ultraviolet metal-semiconductor-metal photodetector (PD) was fabricated using DC sputtering method.

Vertically aligned nanorods images were captured from field emission scanning electron microscopy. XPS analysis confirmed greater spin-orbital interaction in the F and Ag co-doped ZnO sample and revealed the presence of F, Ag, Zn and O in the samples, indicating a successful doping process. X-ray diffraction revealed a hexagonal wurtzite structure with enhanced crystal quality upon co-doping. The bandgap decreased from 3.19 to 3.14 eV upon co-doping because of reduced defects density in the sample. Finally, an ultra-violet PD was fabricated with enhanced sensitivity and response times upon co-doping.

The low-cost, less energy-consuming Duran laboratory bottle and water boiler system were used as the substitute of expensive, more energy-consuming stainless autoclave and oven in a hydrothermal method for synthesis of F and Ag co-doped ZnO and subsequent fabrication of PD.

The aim is to examine the long run and short run linear and non-linear impact of foreign direct investment (FDI) inflows on poverty in Nigeria from 1980 to 2019.

The Augmented Dickey Fuller, Phillips Perron and Kwiatkowski-Phillips-Schmidt-Shin unit root tests and bounds test were used to tests the series stationarity and co-integration, respectively. Autoregressive Distributive Lag (ARDL) and non-linear and linear autoregressive Distributive Lag (NARDL) estimators are employed to examine the long run and short run impact of the coefficients of the variables and diagnostic check.

The study finds that the variables are integrated at a level I(0) and the first difference I(I) and co-integrated. The ARDL estimator indicates that FDI significantly reduces poverty in the long and short run. The findings under NARDL shows FDI positive shock and FDI negative shock reduces poverty substantially in the long-short run, respectively. The error correction term is negative and significant.

This study is limited to a single country (time series) and less informative compared with the panel data study with much informative and free from hetero-scedasticity. Future studies should consider panel data using a similar or dissimilar approach.

FDI inflows stimulate growth, thereby creating job openings, transfer of modern technology and reduce poverty and demonstrate that, if the finding integrated into policy actions, the government would attract FDI inflows for the real sector of the economy.

FDI inflows lead to environmental degradation if inferior technology is use in the host economy, especially the weak environmental regulations in Nigeria.

The authors find no study that applied both ARDL and NARDL estimator, selection of variables measurement and time frame for the study in the context of Nigeria.

The peer review history for this article is available at: https://publons.com/publon/10.1108/IJSE-08-2020-0530.

The study aims to evaluate the impact of corporate board gender on the energy disclosure with moderating effect of institutional strength (global competitiveness index) by the listed firms in Nigeria.

The study uses a sample of 49 non-financial firms listed on the floor of the Nigerian stock exchange commission for the period of five years (2016–2020). The study uses content analysis techniques to obtain data on environmental disclosure through the use of Global Reporting Initiative standards from the sampled firms. Random and fixed effect regression analyses were run for both direct and moderation models. Based on the results of the Hausman tests, random results were adopted and used in examining the relationship among research variables.

The study revealed average energy disclosure by the sampled firms. The overall results of the regression analysis found that board gender diversity is significantly related to energy disclosure. The institutional strength moderation result was found to have an insignificant impact on the relationship between board gender and energy disclosure.

The study is constrained by not considering all environmentally sensitive firms in the country. Furthermore, the study considered only gender among numerous important board attributes. Hence, other important board attributes should be assessed for better energy disclosure. Future studies should consider data from all sensitive firms and other board attributes.

Recently, the Nigerian Government mandates all firms to comply with environmental disclosure in Nigeria, this should be used as a way forward to encourage and compel all listed firms to improve their energy disclosure.

With diverse and vibrant women on boards, firms would benefit and gain legitimacy across demographic, ethnic and religious groups in the society. Hence, corporate bodies can effectively contribute toward enhancing the social welfare of various segments of society.

To the best of the authors’ knowledge, this is the first study that provides empirical evidence on the effect of board gender attributes on the energy disclosure using institutional strength as a moderator in Nigeria.

It is generally agreed that shortage of food, which is one of the main problems bedevilling Sub-Saharan African region, can be eliminated via the adoption of modern agricultural production technology, one of which is chemical fertiliser. The purpose of this paper is to assess the factors that can be used to improve the intensity of fertiliser use in rural Sub-Saharan African countries, taking Tofa, a local government area in Kano State, Nigeria, as the case study.

The study adopted a two-stage sampling technique. In the first stage, four districts were chosen using a simple random sampling technique from the list of the 15 districts in the local government area, namely, Tofa, Langel, Lambu and Doka. In the second stage, 25 farmer households were systematically selected from each of the selected communities. Moreover, Tobit Regression model was used to examine and analyse the influence of some socio-economic factors on fertiliser use intensity.

To improve the rate of fertiliser use intensity, farmers need to be exposed to skills and training on some off-farm jobs to raise the farmers’ income to enable them to afford more fertiliser. The study finds that income, contact with extension agent, age of the farmer and method of fertiliser application have positive significant impacts on the intensity of fertiliser use. On the other hand, price of fertiliser was found to have negative impact on the intensity of using fertiliser in the study area. Furthermore, based on the data obtained from the selected samples, the average rate of fertiliser application in Tofa local government area during the crop season of 2011/2012 was 25 kg per hectare.

Policies that will strengthen the farmers’ contact with extension agents throughout the farming periods should be adopted. Also, farmers need to be exposed with skills and training on some off farm jobs to raise the farmers’ income to enable them afford more fertiliser.

The purpose of this paper is to look at the asymmetric effect of oil production on environmental degradation in OPEC member countries from 1970–2019.

The authors build a nonlinear panel ARDL–PMG model using the Shin et al. (2014) nonlinear autoregressive distributed lag (ARDL) approach in panel form to assess both the short- and long-run impact of positive and negative oil production movements on CO₂ emissions.

The result demonstrates that the variables are cointegrated. According to the linear long run coefficients, oil production, FDI inflows and economic growth both have a positive and significant relationship with CO₂ emissions, implying that they deteriorate environmental quality in OPEC countries, while renewable energy has a negative relationship with CO₂, implying that increasing renewable energy improves environmental quality. The asymmetric findings prove that positive and negative shocks of oil production exert a positive effect on carbon emissions in short run and long run.

To begin with, the empirical assessments do not include all OPEC member nations; researchers are advised to resolve this constraint by looking at the economies of other OPEC members. Albeit the lack of data for other energy sources may serve as another constraint of this research, future research is expected to broaden the current framework via other energy sources such as nuclear, electricity, biomass, solar as well as wind.

The research adds to the body of knowledge as many of the prevailing studies in the literature failed to look at the asymmetric effect of oil production on the quality of environment. This is another gap in the literature that the current study is set out to fill. This study adds oil production as an explanatory variable and helps to extend the existing literature for OPEC countries, which could propose a solution to deal with ensuing environmental issues.

This study aims to explore the opportunities and challenges in activating a Smart Contract to enhance the efficiency and effectiveness of Ṣukūk offerings in the Islamic capital market.

The study adopts a mono-method qualitative approach. Data were obtained from survey interviews of two issuances on the fusion of smart contracts in Ṣukūk structures that were Sharīʿah-compliant. A thematic approach was further used to analyze the interview data based on the onion research method while opportunities and challenges of activating the Smart Ṣukūk (SṢ) relied on doctrinal evidence.

The results from the issuances across two jurisdictions showed that deployment of SṢ can resolve contractual ambiguities arising from Sharīʿah interpretations, jurisdictional policies and legal regime issues, which affect Ṣukūk origination and issuances especially on the right of investors in the event of Ṣukūk defaults. Although SṢ is automated, the third party’s presence is not eliminated as the blockchain platform still relies on the validators who are usually blockchain developers functioning as a third party in the Ṣukūk chain.

The study relies on doctrinal literature to explain the features and requirements of SṢ. The empirical approach is limited to interview data based on local SṢ issuances. Future studies need to explore regulators’ role and global standards in cross-border issuance of SṢ with multiple jurisdictions/laws.

The paper concludes that the offering of SṢ using local currency has been successful in the two issuances because of the facilitative regulatory environment. However, addressing Ṣukūk’s challenges in cross-border offerings would require guidance from international standard-setters such as the Accounting and Auditing Organization for Islamic Financial Institutions and the Islamic Financial Services Board.

This study is an advanced application of smart contracts to alleviate the related Ṣukūk challenges in the Islamic capital market.

The purpose of this study is to demonstrate how alertness enable small and medium scale enterprise (SME) owners to leverage their individual entrepreneurial orientation (IEO) such as risk-taking, pro-activity, innovation, passion and perseverance in a better way to recognize opportunities for financial resources as compared to their counterparts who are not alert. Moreover, it elaborates on the mediating role of opportunity recognition of financial resources between IEO and SMEs’ access to finance (AF).

A three-wave time-lagged survey from a stratified sample of 271 small and medium scale business owners in Pakistan was conducted and the data were analysed using PROCESS models 1 and 4.

The findings grounded in the theory of Action Regulation, signify that the IEO of small and medium scale business owners helps them attain financial resources through opportunity recognition capacity which is an action characteristic. Moreover, the IEO of SME owners, coupled with entrepreneurial alertness (EA; a cognitive pre-action state), amplifies their ability to recognize opportunities for financial resource availability.

This is one of the initial studies to test the IEO scale, including passion and perseverance. Moreover, it has added to the individual-level antecedents of AF in small and medium scale businesses through the role of EA and opportunity recognition.