Business Green: Chinese thin-film solar cell manufacturer Trony Solar has become the latest renewable energy firm to fall victim of the sluggish initial public offering (IPO) market, further confusing the outlook for clean-tech companies seeking listings. The company confirmed earlier this week that it is indefinitely postponing plans for a US IPO that was initially expected to be worth up to $200m (£130m). Citing unfavourable market conditions, the company said that it cancelled its filing …